More Than A Solar Simulator: SS-X Series Solar Light Simulator

Date: Jan. 27, 2021

More than a solar simulator: SS-X 
series Solar Light Simulator

Complied With IEC 60904-9:2020 Standard

SS-X is a comprehensive A+ spectrum grade solar simulator developed in accordance with IEC 60904-9:2020 standard.

IEC 60904-9:2020 is developed for solar simulators, which is used in PV testing. It defines the classifications of solar simulators using in 
indoor PV measurements including cells and modules. Solar light simulators are classified as 4 classes (A+, A, B, or C) based on criteria of temporal 
irradiance instability, spectral distribution match, and irradiance non-uniformity in the plane under testing.

The main differences between this third edition and the previous second edition are introduction of new A+ class and the spectral range. The spectral wavelength range is expanded from 400nm~1100nm to 300nm~1200nm, which is the biggest revision since 2007. In response to the rapid development and accurate evaluation of new generation high-efficiency solar cell technologies, such as HJT, TOPCon, Organic Solar Cells (OSCs), Perovskite Solar Cells (PSCs), and perovskite tandem solar cells.

The features of SS-X solar simulators are listed below.

A+ Spectrum: the closest to AM1.5G standard spectrum

The AM1.5G filter of SS-X solar light simulator, which is made with the advanced Plasma Deposition technology, has the high spectral accuracy and the excellent durability for the triples service lifetime. The better spectrum grade makes SS-X suitable than any other simulators to characterize a wide variety of new solar cells such as low-bandgap organic solar cells and perovskite/Si tandem solar cells.

A+ temporal instability of irradiance 

The SS-X adopts the medical-device-level power supply system, which provides the smaller electrical ripples. The better electrical current output allows the irradiance temporal instability of SS-X solar light simulator to achieve the better A+ grade. This better irradiance instability makes it possible to discover the more detail science of the new generation solar cells such as perovskite solar cells. 

SS-IRIS: Exclusive patent technology for auto-light-intensity manipulating

SS-IRIS is the exclusive patent of Enli Technology. It is the sole technique in the world that it can automatically change the irradiance intensity without changing the spectrum of the irradiance, at the same time. The irradiance range can be tuned from 0.01sun to 1sun (1mW/cm2~100mW/cm2) with 1% accuracy. 

More Than a Solar Simulator

Combined the accessories and advanced softwares, SS-X can be utilized to study and analyze the physics behind the IV curves. For instance, SS-X solar simulator can be combined with Enli’s powerful IV software, IVS-KA6000, to perform Sun-Voc and Sun-Jsc, simultaneously. These experimental raw data can be loaded to KA-Viewer software for analyzing ideality factor n, automatically, which greatly reduces the inconvenience of intensity-dependent measurements. 

More Details…

About the lamp:

SS-X solar simulators use the steady-state short-arc xenon lamp technology, which can be used to accurately characterize the new types of solar cells, such as HJT or perovskite solar cell. These new types of solar cells require longer time to reach carrier balance due to their higher capacitance effects. Steady-state solar simulator can provide the stable and continuous irradiance condition to illuminate the solar cells under test, avoiding the characterization errors due to the slow response time of the cells. 

Uniform Irradiance

The most difficult technical specification of the solar simulator is the uniformity of the irradiance spatial distribution. All SS-X series solar simulators not only utilize optical simulation software to simulate the optical and mechanical system design, but also adopt Fourier-optics technology to generate the spatial uniform irradiance, which has been used in semiconductor mask aligner with excellent prove. 

Output Beam Directions

SS-X series solar simulators support the function of setting the output beam direction.
- Normal: the standard output beam direction is up-to-down direction.
- Bottom-up: upward output beam direction, which is suitable for integrating with the glove box integration.
- Right & Left: sideways configurations which is generally used to illuminate the water-splitting cells. 

Integrated Optical Shutter

In SS-X series solar simulators, beam size above 100mm x 100mm, are all integrated with a single-blade mechanical shutter. It can be controlled by the Xe Power Supply manually or automatically, and switch status from Open to Off within 199ms. 

Xe Power Supply

The Power Supply of SS-X series solar simulators has the features below:
- 3.5” color-touch-panel. 
- Digital timer, up to 9999 hours to monitor the lamp life.
- Digital lamp voltage and current display.
- Over voltage/ over current/ over temperature warning.
- Cooling Delay time control after lamp shutdown.
- Illuminator cover safety lock warning and light source auto shutdown.
- Built-in programmable shutter control module.
- Built-in programmable SS-IRIS aperture control module.
- RS232 port.

IV Testing Software: IVS-KA6000

IVS-KA6000 is the most powerful IV testing software in the world. Combined with SS-X series solar simulators, it can perform many kinds of vital measurements for accurate and analytical characterization on solar cells. 

More details:

IVS-KA6000:The Most Powerful IV measuring software 

Reference Cells

Enli Technology provides the world’s most types of reference cells which comply with the WPVS type and IEC 60904 standards. The purpose of reference cells is helping accurately characterize the solar cells to catch up the rapid development of the variety of new solar cells. The unique optical filter embedded technology helps build different spectral wavelength range response of reference cell, which can reduce the spectral mismatch between the solar simulators and new type solar cells. The calibrated reference cell is an indispensable part of solar simulator calibrations and accurate solar cell characterizations. Enli Technology’s calibration laboratory accredited through the ISO/IEC 17025 standard. All of the SRC-2020 series reference cells are calibrated through tracing to NREL or ISE Fraunhofer. Enli Technology also provides the re-calibration service for reference cells. 

Solar Cell Calibration and Testing Laboratory

Enli Technology Calibration Laboratory is the world’s first commercial company who pass the ISO/IEC 17025 accreditation in the PV field in 2012. We provide solar cell conversion efficiency certifications by advanced testing instruments, including SS-X solar simulators and the QE-R quantum efficiency testing system. In 2020, we already finished the accreditation transition from ISO/IEC 17025:2005 to ISO/IEC 17025:2017, which is the latest calibration laboratory operation standard and provide the better quality of certification services. We can provide solar cell quantum conversion efficiency and quantum efficiency measurements according to IEC 60904-1 and IEC 60904-8, respectively. All of the working standards and testing results are traceable to SI units through the calibrations by NREL, Fraunhofer ISE, or NIM. 

The Maintenance of SS-X 
- SS-X series solar simulators can maintain A+ spectral performance during the “Performance Lifetime” which is not equal to “Lamp lifetime”.
- Any simulator needs to be re-aligned and adjusted after changing the lamp in order to achieve the required performance.
- Enli Technology provides field measurement and adjustment services by professional and qualified engineers.
- Enli Technology provides maintenance service even expired the warranty period to help your system keeping in conditions.

Models of SS-X series
- SS-X50
- SS-X100R
- SS-X180R
- SS-X200R
- SS-X220R 
- SS-X300R