Study of high efficiency semitransparent polymer solar cells with stable color render index

Wenjuan Yu; Bingting Wang; Changhai Zhou; Kexiu Dong; Gan Jin

doi:10.1117/12.2662609

12 April 2023 Study of high efficiency semitransparent polymer solar cells with stable color render index

Wenjuan Yu, Bingting Wang, Changhai Zhou, Kexiu Dong, Gan Jin

Proceedings Volume 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022); 125652B (2023) https://doi.org/10.1117/12.2662609
Event: Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 2022, Shanghai, China

Abstract

As we known, the color render index(CRI) and the power conversion efficiency (PCE) are two critical parameters of semitransparent polymer solar cells (PSCs), which are contradictory. The CRI are strongly depended on the absorption of the polymer: fullerene active layer. The PCE is not only rely on the absorption but also on the bulk-heterojunction structure. Here, the 1,8-diiodooctane (DIO) additive were added into the PCDTBT: PC71BM blend PSCs to improve the PCE with almost unchanged CRI. Based on the higher boiling point than host solvent ODB and better solubility of PC71BM, the device photovoltaic properties with DIO additive were changed obviously. The PCE improvement is attribute to the charge recombination and transportation process which means the utilization of the absorbed photon is improved. But this improvement cannot affect the transmitted light. Hence, the CRI of transmitted light is nearly invariable. With 3% v/v DIO, the Jsc, Voc and FF are both increased. Correspondingly, a highest PCE is achieved of 6.15%, while the reference device without DIO only has a PCE of 5.23%. At the same time, the CRI is slightly changed from 82 to 81.

Citation Download Citation

Wenjuan Yu, Bingting Wang, Changhai Zhou, Kexiu Dong, and Gan Jin "Study of high efficiency semitransparent polymer solar cells with stable color render index", Proc. SPIE 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 125652B (12 April 2023); https://doi.org/10.1117/12.2662609

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