Infrared Solar Panels: Working, Types & Uses in 2026

Conventional silicon solar panels can convert visible light and some near-infrared light into electricity. However, they cannot use longer infrared (IR) wavelengths beyond their absorption limit of ~1,100 nanometers (nm). Researchers are developing infrared solar cells to capture some of these otherwise unused wavelengths and improve solar energy conversion.

However, an infrared solar panel does not refer to a single standard solar panel technology. Organic cells, polymer cells, quantum-dot cells, transparent photovoltaics, and tandem cells can all use infrared light in different ways.

This guide explains how infrared solar cells work, how infrared plastic solar cells differ from conventional silicon PV (photovoltaic) panels, their efficiency, types, applications, availability in India, price, and future potential.

What Are Infrared Solar Panels?

Infrared solar panels are photovoltaic devices designed to convert specific infrared wavelengths into electricity, either independently or in combination with materials that absorb other parts of the solar spectrum. Most infrared photovoltaic research focuses on near-infrared wavelengths rather than the entire infrared spectrum.

Infrared begins just beyond the red end of visible light. However, whether a solar cell can convert a particular infrared wavelength depends on the bandgap and optical properties of its semiconductor material.

The term IR solar panel is therefore better understood as a broad description. It can refer to several different cell technologies designed to make greater or more selective use of infrared light.

What Part of the Infrared Spectrum Can Solar Cells Use?

Solar photovoltaic cells primarily use the shorter-wavelength portion of the infrared spectrum, particularly near-infrared light. Infrared begins at ~700 nm, but the usable range depends on the material used inside the cell.

For example:

• Organic semiconductors can be chemically designed to extend absorption further into the near-infrared.
• PbS (lead sulfide) quantum dots can have their bandgap tuned to absorb longer infrared wavelengths, including wavelengths beyond 1,000 nm.

Sources: Scientific Reports study on silicon solar-cell infrared response and Nature Communications study on infrared-sensitive photovoltaic tandems

As wavelengths become longer, each photon carries less energy. Eventually, the photons no longer have enough energy to generate usable electrical charges in a particular semiconductor.

This is why infrared solar cell research generally focuses on near-infrared and short-wave infrared rather than on converting the entire infrared spectrum into electricity using conventional photovoltaic principles.

Do Conventional Silicon Solar Panels Absorb Infrared Light?

Yes, conventional crystalline silicon panels absorb visible light and part of the near-infrared spectrum. However, longer wavelength photons eventually carry too little energy to generate electricity in silicon.

Silicon has a bandgap of ~1.12 eV (electron volt), giving it a long wavelength response limit of ~1,100 nm (nanometer).

Infrared photovoltaic research therefore focuses on capturing wavelengths that other absorbers cannot use efficiently or on combining materials that use different portions of sunlight.

What Is an Infrared Plastic Solar Cell?

An infrared plastic solar cell uses organic or polymer-based photovoltaic materials, sometimes combined with infrared-sensitive nanomaterials such as quantum dots, to convert infrared light into electricity.

Researchers are exploring two main approaches to improve how these cells absorb infrared light:

• Combining polymers with nanocrystals: Semiconductor nanocrystals that absorb infrared wavelengths are combined with polymers to help convert the absorbed light into electricity.
• Developing advanced organic materials: Researchers are designing organic donor and acceptor materials that can absorb a wider range of near-infrared wavelengths.

Is a Plastic Solar Cell the Same as an Organic Solar Cell?

A plastic solar cell is generally a type of organic solar cell, but the two terms are not completely interchangeable.

• Polymer solar cells specifically use semiconducting polymers
• Organic photovoltaics can also use other carbon-based semiconductor molecules

The word plastic refers to the polymer-based materials and their potential for thin, lightweight, and flexible manufacturing. It does not simply mean placing conventional silicon cells inside plastic.

What Materials Are Used in Infrared Plastic Solar Cells?

Infrared plastic cells do not have a fixed material composition. Their absorber and charge-transport materials vary depending on the targeted wavelength range, flexibility, transparency, and efficiency.

Common material categories include:

• Conjugated polymers that absorb light or act as electron donors
• Organic acceptor materials, including modern non-fullerene acceptors
• Quantum dots, such as PbS nanocrystals with tunable bandgaps
• Conductive electrodes and transport layers that collect and move electrical charges

How Does an Infrared Solar Cell Work?

An infrared solar cell works by absorbing infrared photons with a suitable semiconductor, using that energy to create mobile electrical charges, separating the charges, and collecting them at electrodes. The exact process varies between organic, quantum-dot, and other infrared photovoltaic cells.

The conversion takes place through five main stages:

1. Infrared light reaches the absorber: The cell contains a material engineered to absorb specific infrared wavelengths.
2. The material absorbs photon energy: The absorbed photon excites charge carriers. In organic photovoltaics, this initially creates a bound electron-hole state called an exciton.
3. Positive and negative charges separate: A junction or donor-acceptor interface helps prevent the charges from immediately recombining.
4. Charges move through the cell: Electrons and holes travel through separate transport pathways towards the electrodes.
5. Electric current is collected: The electrodes collect the charges, allowing current to flow through an external circuit.

What Are the Different Types of Infrared Solar Cells?

Infrared photovoltaic cells can use organic materials, nanocrystals, transparent absorbers, or multiple photovoltaic layers. The four major approaches differ mainly in how they absorb and use infrared wavelengths.

Let’s understand all four.

1. Organic and Polymer Infrared Solar Cells

Organic and polymer cells use carbon-based semiconductor materials whose absorption properties can be modified through molecular design. Modern organic photovoltaic cells can absorb strongly in the near-infrared while remaining thin and lightweight.

2. Quantum-Dot Infrared Solar Cells

Quantum dots are semiconductor particles only a few nanometres wide. Their bandgap can be adjusted by changing their size and composition, allowing researchers to target specific infrared wavelengths.

PbS quantum dots are widely studied because they can absorb longer-wavelength photons beyond the useful range of silicon.

3. Transparent and Semitransparent Infrared Solar Cells

Transparent and semitransparent cells can be designed to transmit much of the visible light while absorbing selected ultraviolet and near-infrared wavelengths.

This makes them suitable for applications such as windows, building facades, and agricultural structures such as solar greenhouses where visible light transmission is important.

Their main challenge is balancing electricity generation with transparency. Increasing visible light transmission generally reduces the amount of solar energy available for electricity production.

4. Infrared-Absorbing Tandem Solar Cells

Tandem cells stack photovoltaic materials with different bandgaps so that each layer converts a different portion of sunlight into electricity.

The different layers work together to capture more sunlight in the following way:

• Upper layer: A wider bandgap cell absorbs higher-energy photons while allowing longer wavelength light to pass through.
• Lower layer: A narrower bandgap cell absorbs some of the longer wavelength light that passes through the upper layer, allowing more of the solar spectrum to be converted into electricity.

Infrared Solar Cells vs Conventional Silicon Solar Cells

Silicon cells are mature photovoltaic devices that already absorb visible and some near-infrared light. Specialized infrared cells, on the other hand, use materials such as organic semiconductors or quantum dots to extend spectral absorption or provide properties such as flexibility and transparency.

Here’s a side-by-side comparison of both:

How Efficient Are Infrared Solar Cells?

The efficiency of an infrared solar cell depends on its technology and the wavelengths of light used during testing. Whole-spectrum organic-cell efficiency, infrared-only efficiency, and tandem-cell efficiency are different measurements and should not be compared as though they represent the same performance.

Some useful current benchmarks are tabulated below:

Sources: 2026 Nature Reviews Clean Technology review on organic photovoltaics, Materials Today Chemistry study on PbS quantum-dot infrared solar cells, and Nature study on Efficient near-infrared harvesting in perovskite-organic tandem solar cells

What Are the Advantages and Limitations of Infrared Solar Panels?

Infrared solar cell technology can extend spectral absorption and enable lightweight, flexible, or transparent photovoltaics. However, commercial availability, long-term durability, large-area manufacturing, and infrared-specific conversion efficiency remain major limitations.

Here’s a look at the key benefits of infrared solar panels:

• Wider light absorption: Certain infrared solar cells can capture wavelengths that conventional silicon cells cannot use effectively.
• Lightweight and flexible designs: Some infrared solar cells can be made thin, lightweight, and flexible, making them suitable for different surfaces.
• Potential for low-cost manufacturing: Some organic and polymer cells can be manufactured using printing or solution-based techniques, which may reduce production costs in the future.
• Adjustable infrared absorption: Quantum-dot solar cells can be engineered to absorb specific infrared wavelengths by changing the size and composition of the quantum dots.
• Improved use of sunlight: Infrared-sensitive materials can be combined with other photovoltaic materials in tandem cells to capture a broader range of sunlight.

Here’s a snapshot of all the key limitations of IR solar panels:

• Lower infrared conversion efficiency: Some infrared solar cells convert only a small portion of the infrared light they absorb into electricity, limiting their performance.
• Limited long-term durability: Certain organic materials can degrade when exposed to sunlight, heat, moisture, and oxygen, affecting their performance over time.
• Difficult large-scale production: Many infrared solar cells perform well in laboratory tests, but maintaining the same efficiency and quality in larger commercial panels remains challenging.
• Complex manufacturing requirements: Some technologies require specialized semiconductor materials and manufacturing processes, which can increase production costs.
• Limited availability in India: Specialized infrared solar panels are still largely in the research and development stage and are not widely available for residential installations in India.

Where Can Infrared Solar Cells Be Used?

Infrared solar cells are particularly promising where transparency, flexibility, or broader spectral absorption provides an advantage over conventional rigid panels.

Potential applications include:

• Solar windows and building facades: Semitransparent cells can transmit visible light while harvesting specific invisible wavelengths in building-integrated photovoltaics (BIPV).
• Greenhouses and agrivoltaics: Wavelength-selective cells could transmit the light plants need while using other wavelengths to generate electricity.
• Flexible and wearable electronics: Thin organic cells can potentially supply lightweight power to sensors and portable devices.
• Tandem solar panels: Infrared-sensitive bottom cells can capture longer wavelengths transmitted through the upper photovoltaic layer.

Are Infrared Solar Panels Available in India?

Infrared-selective plastic or quantum-dot panels are not yet a mainstream residential solar product in India. However, India has conducted significant research into organic, polymer, and flexible photovoltaic technologies.

For example, IIT Kanpur’s Samtel Centre for Display Technologies documented work on organic solar cells for rooftop applications, organic sub-modules on glass and flexible substrates, and organic solar cells printed on paper.

Source: IIT Kanpur SCDT Organic Solar Cells document

There’s research and prototype development in India, but that doesn’t mean infrared plastic panels are currently a standard alternative to silicon panels for commercial solar panel systems.

What Is the Price of an Infrared Plastic Solar Cell?

Based on standard market research, products listed under the broader plastic solar panel category are available at ~₹2,000* to ~₹25,000* per panel. However, genuine infrared-selective plastic PV does not yet have a standardized retail per-watt price in India because it is not commercially popular.

*Please note: These figures are based on standard market research and should be treated as an actual range. Actual prices can vary based on panel wattage, cell technology, materials, flexibility, manufacturer, efficiency, warranty, order quantity, taxes, and seller margins. Products marketed as plastic solar panels may also employ different photovoltaic technologies and should not be automatically assumed to use infrared-sensitive polymer cells. SolarSquare does not manufacture, sell, install, or endorse IR solar panels. We install rooftop solar systems for housing societies, homes, and commercial and industrial properties using high-efficiency TOPCon solar panels

What Is the Future of Infrared and Plastic Solar Cell Technology?

Infrared and plastic solar-cell research aims to improve performance, durability, and manufacturing while developing applications that are difficult to achieve with conventional rigid silicon modules.

Current research is focused on:

• Improving organic-cell efficiency and stability
• Developing stronger near-infrared absorbers
• Improving quantum-dot infrared conversion
• Developing flexible manufacturing methods
• Combining infrared-sensitive materials with tandem solar cells

The future of these technologies depends on whether laboratory advances can be transferred to durable, affordable, large-area modules. Researchers must also establish reliable manufacturing methods and demonstrate that the cells can maintain their performance during prolonged outdoor use.

Homeowners planning a rooftop installation today should select commercially proven modules with dependable warranties and service support. Book a free consultation with SolarSquare to choose a suitable rooftop solar system for your property.

Frequently Asked Questions

Do infrared solar panels work on cloudy days?

Yes. Infrared solar cells can generate electricity from available sunlight on cloudy days, but their output still decreases when solar irradiance falls.

Can infrared solar panels generate electricity at night?

No. An infrared-sensitive solar cell still needs sufficient photons within its usable wavelength range. Thermal infrared emitted by surrounding objects is generally unsuitable for normal solar photovoltaic generation.

Are infrared solar panels more efficient than normal solar panels?

Not necessarily. Infrared sensitivity alone does not increase efficiency. Commercial silicon modules already achieve high efficiencies, whereas infrared, organic, and tandem research cells exhibit varying efficiencies depending on their materials and testing conditions.

Are infrared solar cells transparent?

Some are. Semitransparent photovoltaic cells can transmit much of the visible spectrum while absorbing selected ultraviolet and near-infrared wavelengths. Other infrared cell technologies are opaque.

Can infrared solar panels be used for homes?

Infrared-sensitive photovoltaic cells can generate electricity, but specialized infrared plastic and quantum-dot panels are not mainstream residential products in India in 2026. High-efficiency crystalline silicon panels remain the practical rooftop option.

What is an infrared solar cell?

An infrared solar cell is a photovoltaic cell capable of absorbing selected infrared wavelengths and converting their energy into electricity. It may use organic materials, polymers, quantum dots, or other semiconductors designed for longer-wavelength absorption.