Enli Tech. Optoelectronic Calibration Lab
Qualified as Third-Party Certification: QE / SR / Jsc Certifications
Enli Tech. Optoelectronic Calibration Lab is accredited to ISO/IEC 17025 (TAF), which enable us to offer calibration services to academics and companies. Enli Tech can help you to confirm the accuracy of the testing results, solve your technical problems and give the proof of your research papers!
Enli Tech Lab adopts the Differential Spectral Responsivity (DSR) method at PTB (Physikalisch Technische Bundesanstalt, Germany); DSR method is recognized one of the most reliable calibration methods in measuring uncertainty. As the third-party certification, Enli Tech Lab conducts exact test methods and procedures to confirm that any kind of solar cells compile with all standard requirements. This allows customers to get the high stability, accuracy and accredited calibrations.
Here is how it works:
The certificated PCE of solar cells’ test Method
The current versus voltage of the above device has been tested according to and the method defined by “Test standard operation procedure of maximum power measurement of solar cells” (document: LAB-PV-3-1.4B) to meet ISO/IEC 17025:2005 (General requirements for the competence of testing and calibration laboratories) specifications by “Enli Tech. Optoelectronic Calibration Lab.”.
Enli Tech. Optoelectronic Calibration Lab. is accredited by Taiwan Accreditation Foundation (TAF) to ISO/IEC 17025. TAF is the full member of ILAC MRA (International Laboratory Accreditation Cooperation Mutual Recognition Arrangement) and IAF MLA (International Accreditation Forum Multilateral Recognition Arrangement).
Measurements are performed under Standard Testing Conditions: 25 °C using the AM1.5G (IEC 60904-3 ed.2.0) spectrum with a total irradiance of 1 Sun (1000 W/m2) with a steady-state class AAA solar simulator according to IEC 60904-9:20074. The spectral mismatch is calculated according to IEC 60904-7:20085. The spectrum of the solar simulator is measured with a spectroradiometer. The spectral responsivity (or quantum efficiency) of the device under test is measured with a grating monochromatic according to IEC 60904-8:20146.
The details of testing procedures.
The device under test (DUT) is an organic polymer solar cell. Each Sample has 1 devices on one glass substrate. The device contact structure is superstrate type.
The active area of DUT was covered with an area-calibrated metal shadow mask. The temperature was controlled with simulator’s mechanical shutter and a TE air-cooler with a RTD temperature sensor to achieve STC condition. The current and voltage data were taken by Keithley 2400 SMU with ISO/IEC 17025:2005 calibration report (No. K3809260101, traceable to NML). Kelvin Probe 4-wire connection method was adopted to remove all wire resistance in the circuit loop, which may affect the current and fill-factor accuracy of test results. The model of solar simulator is SS-F5-3A. The 1 sun intensity of SS-F5-3A was set by the WPVS type reference cell with KG5 optical filter which is calibrated by NREL (NREL calibration No.: 1956, NIST traceability). The spectroradiometer (model: SPR-3011-SP; ISO/IEC 17025 Lab. calibrated and traceable to NML) was used to measure and monitor the spectrum of solar simulator. The spectral responsivity (or quantum efficiency) was measured according to IEC60904-8:2014. The traceability to SI-Units is achieved by using a calibrated photodetector (ISO/IEC 17025 Lab calibrated and traceable to NIST). After all of the tests and the measurements, the spectral mismatch correction factor, MMF, was calculated based on IEC 60904-7:2008. In general, it is better if MMF is as close to one as possible. In this test, MMF is 0.9996 which means the spectral error is smaller than 0.1%.
Enli Tech Lab provides efficiency certification services for any kind of solar cells, the certification items as follow:
◎ External Quantum Efficiency, EQE
◎ Spectral Response, SR
◎ Short-circuit Current Density, Jsc
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