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Description of PD IEC TR 63228:2019 2019This Technical Report summarises present perspectives on the performance evaluation of emerging PV technologies, specifically OPV, DSC and PSC devices. These devices present some challenges for accurate measurement under the existing IEC 60904 series of standards, which were developed in the context of silicon wafer solar cells. These challenges can be different for different devices, but in general they arise due to one or more of the following: instability in performance over time; unusual spectral responsivity; small device size; difficulty in measuring temperature; a transient response to external stimulus; optical interference effects; and a non-linear current response to irradiance. These challenges can lead to the cell output in laboratory testing being significantly different to the output that would be observed in a real application. The primary focus of the report is measurement of the current-voltage (I-V) relationship under illumination for the purpose of determining the device output power, or power conversion efficiency. Where appropriate, the report makes reference to the IEC 60904 series which describes the standard approach to measuring the performance of all PV devices. The report also references existing published standards that seek to accommodate OPV, DSC or PSC devices. The report does not seek to find consensus on measurement protocols at this stage. A lot of work has been done by the community toward that aim, but more work is needed. The report therefore seeks to document current knowledge and practices, hence serving as a reference and a tool for conducting further discussion. It is hoped that by identifying the issues that remain unresolved, the report will focus efforts toward resolving those issues, such that a guiding Technical Specification can be prepared in the near future. A robust Technical Specification will bring clarity and confidence to the markets for these PV products as they develop.
About BSIBSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses. |
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