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Solar Simulators


A solar simulator is a device which emits light closely resembling the solar irradiance received on Earth. Its light output is carefully calibrated against a reference spectrum to ensure maximum spectral match. One of their main uses is in conjunction with a current-voltage measurement system for characterizing solar cells. You can also use solar simulators to study photobiological systems, material exposure to sunlight, and many other applications.

We offer a low-cost, highly versatile solar simulator, that you can use either as a standalone system or with our I-V test systems to form a complete solar cell testing kit. When used with one of our substrate platforms, fabricating and testing solar cells is quick and easy.

Jump to: Browse solar simulators | Classifications | Resources and support

Browse Solar Simulators


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Classification of Ossila Solar Simulators


Our solar simulator uses an LED lamp, making it stable, reliable, and easy-to-use. Designed for small areas, the output is AAA rated over a 15mm diameter illuminance area and adheres to the latest solar simulator standards (IEC 60904-2020). By default, the solar simulator outputs 1 sun of illuminance (100 mW/cm2 or 1000 W/m2) over the wavelength range of 380 nm – 1000 nm but you can adjust the optical output power down to an illuminance of 10 mW/cm2 if needed. You can also individually control the output power of each of the 11 LED wavelengths.

Ossila solar simulator light source
LED Solar Simulator Lamp With Indoor Light Filter
Spectral match A A
Spatial uniformity over 15 mm diameter area A B
Spatial uniformity over 25 mm diameter area B C
Spatial uniformity over 32 mm diameter area C N/A
Temporal instability A SA

Resources and Support


Buying Guides

Solar Simulator Light Sources Solar Simulator Light Sources

Choosing the right light source for your solar simulator is one the most important decisions to make when setting up a PV testing laboratory.

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Why You Should Buy the Ossila Solar Simulator Why You Should Buy the Ossila Solar Simulator

A solar simulator is an essential piece of equipment for any lab working with photovoltaics, optoelectronics, or any research that requires a simulated sunlight environment.

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Maintenance and Operation

How to Set Up a Solar Simulator Light Source How to Set Up a Solar Simulator Light Source

The solar simulator light source is compact, lightweight and can be easily installed in any lab using adjustable height stand provided with it.

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How to Check Solar Simulator Calibration How to Check Solar Simulator Calibration

It is important to ensure that your solar simulator is outputting a consistent spectral output. Different solar simulators will have different bulb lifetimes.

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Wavelength bins for solar simulator classification and calibration Solar Simulator Classification and Calibration

For a light source to be classed as a solar simulator, it must be evaluated according to one of three standards, and comply with the specifications set out within.

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Automated Solar Simulator Assembly Automated Solar Simulator Assembly

This system was designed to be easy to use, and effortless to assemble. This video and subsequent guide will demonstrate how easy setting up your testing lab can be with the Ossila Automated Solar Cell Testing Kit.

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Measuring J-V Curves with Ossila Solar Cell Testing Equipment Measuring J-V Curves with Ossila Solar Cell Testing Equipment

When it comes to testing the performance of solar cells, accurate measurements and reliable equipment are essential. If you are conducting research into PV materials, understanding how to measure and interpret J-V curves is crucial in assessing device performance

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Theory and Applications

The AM1.5 Spectrum The AM1.5 Spectrum

Solar irradiance varies depending on where you are in the world. This is because of a combination of local atmospheric conditions and geometric considerations.

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Solar Simulator Irradiance and Spectral Mismatch Solar Simulator Irradiance and Spectral Mismatch

Solar simulators generally attempt to replicate the standard AM1.5G spectrum which has a total integrated irradiance of 1000.4 W/m2 over the wavelength range of 280 nm – 4000 nm.

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Set up for characterizing solar cells Solar Simulator Applications

The most common use of a solar simulator is to characterize photovoltaic devices.

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Solar Cell Testing & Characterization Solar Cell Testing & Characterization

One main application of solar simulators is to test solar cell devices and modules. To characterize how solar cells will perform in the real world, it is vital that you use a solar source that mimics the suns spectrum well. You could of course use actual sunlight, but this is an uncontrollable variable.

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Solar Simulator Design

In order to design a solar simulator, you will need the following components:

  • A calibrated light source
  • Optical filters or lenses to improve light uniformity.
  • A fan or cooling system to stop the light source from overheating.
  • A fixed or adjustable stand and testing stage.
  • Specific control elements and power source
  • Software to control and monitor the solar simulator's experimental use

The most important part of the solar simulator will always be the light source but all these elements should be optimised for your system. The Ossila Solar Simulator is specifically engineered to handle all these considerations, providing a reliable spectral output, so you can simply plug it in without having to worry about any of the technical details.

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Analyzing and Improving Low Device Metrics: FF, VOC and JSC Analyzing and Improving Low Device Metrics: FF, VOC and JSC

Anaylzing key device metrics such as fill factor (FF), open-circuit voltage (VOC), and power conversion efficiency (PCE), can help you find potential issues with your solar cell devices

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Solar Cell Efficiency Formula Solar Cell Efficiency Formula

In order to ensure that different solar cells are compared consistently within the field of solar cell research, we use a standard formula for determining their efficiency.

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Fill Factor of Solar Cells Fill Factor of Solar Cells

Fill factor (FF) is an important measurement that you can use to evaluate the efficiency of solar cells.

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Plotting I-V Curves using Python Plotting I-V Curves using Python

Use the following Python code to plot this data using Panda DataFrames. Just copy and paste the code below into your Python virtual environment and start plotting.

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Solar Simulators: Interpreting Spectral Irradiance Graphs Solar Simulators: Interpreting Spectral Irradiance Graphs

The aim of this article is to contextualise the spectral irradiance graphs you see throughout our website and elsewhere.

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Interpreting J-V Curves: Insights into Solar Cell Performance Interpreting J-V Curves: Insights into Solar Cell Performance

With so many variables in a PV device, it can be difficult to pinpoint the exact issue affecting your solar cell's performance.

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Radiometry and Photometry Radiometry and Photometry

Light can be measured either photometrically (only light visible to the human eye is considered) or radiometrically (also considers the energy in the invisible parts of the electromagnetic spectrum).

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Excitons: An Introduction Excitons: An Introduction

When an electron is excited into a higher energy state, either through absorption of a photon or another excitation method, this creates a positively charged space in the lower energy leel known as a "hole."

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