%0 Journal Article %1 cojocaru2017determination %A Cojocaru, Ludmila %A Uchida, Satoshi %A Tamaki, Koichi %A Jayaweera, Piyankarage V. V. %A Kaneko, Shoji %A Nakazaki, Jotaro %A Kubo, Takaya %A Segawa, Hiroshi %D 2017 %J Scientific Reports %K efficiency hysteresis iv organics solar-cell %N 1 %P 11790-- %R 10.1038/s41598-017-10953-3 %T Determination of unique power conversion efficiency of solar cell showing hysteresis in the I-V curve under various light intensities %U https://doi.org/10.1038/s41598-017-10953-3 %V 7 %X Energy harvesting at low light intensities has recently attracted a great deal of attention of perovskite solar cells (PSCs) which are regarded as promising candidate for indoor application. Anomalous hysteresis of the PSCs a complex issue for reliable evaluation of the cell performance. In order to address these challenges, we constructed two new evaluation methods to determinate the power conversion efficiencies (PCEs) of PSCs. The first setup is a solar simulator based on light emitting diodes (LEDs) allowing evaluation of the solar cells at wider range of light intensities, ranging from 102 to 10−3 mW·cm−2. As the overestimate error, we found that the PCEs of dye sensitized solar cell (DSC) and PSCs increase dramatically at low light intensities conditions. Due to the internal capacitance at the interfaces on hybrid solar cells, the measurement of current below 10−2 mW·cm−2 shows constant value given high PCE, which is related to the capacitive current and origin of the hysteresis. The second setup is a photovoltaic power analyzing system, designed for tracking the maximum power (P max) with time. The paper suggests the combination of the LED solar simulator and P max tracking technique as a standard to evaluate the PCE of capacitive solar cells.

@article{cojocaru2017determination, abstract = {Energy harvesting at low light intensities has recently attracted a great deal of attention of perovskite solar cells (PSCs) which are regarded as promising candidate for indoor application. Anomalous hysteresis of the PSCs a complex issue for reliable evaluation of the cell performance. In order to address these challenges, we constructed two new evaluation methods to determinate the power conversion efficiencies (PCEs) of PSCs. The first setup is a solar simulator based on light emitting diodes (LEDs) allowing evaluation of the solar cells at wider range of light intensities, ranging from 102 to 10−3 mW·cm−2. As the overestimate error, we found that the PCEs of dye sensitized solar cell (DSC) and PSCs increase dramatically at low light intensities conditions. Due to the internal capacitance at the interfaces on hybrid solar cells, the measurement of current below 10−2 mW·cm−2 shows constant value given high PCE, which is related to the capacitive current and origin of the hysteresis. The second setup is a photovoltaic power analyzing system, designed for tracking the maximum power (P max) with time. The paper suggests the combination of the LED solar simulator and P max tracking technique as a standard to evaluate the PCE of capacitive solar cells.}, added-at = {2017-09-20T15:04:16.000+0200}, author = {Cojocaru, Ludmila and Uchida, Satoshi and Tamaki, Koichi and Jayaweera, Piyankarage V. V. and Kaneko, Shoji and Nakazaki, Jotaro and Kubo, Takaya and Segawa, Hiroshi}, biburl = {https://www.bibsonomy.org/bibtex/2b605ab73cafe7f5ecfff97cb8448aa6e/martinstreiter}, doi = {10.1038/s41598-017-10953-3}, interhash = {fc8557a3620a4fcf1f0cf036375954ef}, intrahash = {b605ab73cafe7f5ecfff97cb8448aa6e}, issn = {20452322}, journal = {Scientific Reports}, keywords = {efficiency hysteresis iv organics solar-cell}, number = 1, pages = {11790--}, refid = {Cojocaru2017}, timestamp = {2017-09-20T15:04:16.000+0200}, title = {Determination of unique power conversion efficiency of solar cell showing hysteresis in the I-V curve under various light intensities}, url = {https://doi.org/10.1038/s41598-017-10953-3}, volume = 7, year = 2017 }