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17 results on '"Yan, Yangjun"'

5. Molecular Orientation‐Dependent Exciton Separation in Optimized Single‐Component Y6 Organic Solar Cells

Author

Yan, Yangjun, primary, Zhao, Shengda, additional, Zhang, Yajie, additional, Wang, Tong, additional, Shi, Yanan, additional, Qiu, Dingding, additional, Zhang, Jianqi, additional, Zhu, Lingyun, additional, Wang, Mengni, additional, Qiao, Jiawei, additional, Hao, Xiaotao, additional, Zhang, Xinghua, additional, and Wei, Zhixiang, additional

Published
2023
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12. Simultaneously Decreasing the Bandgap and V oc Loss in Efficient Ternary Organic Solar Cells

Author

Yan, Yangjun, primary, Zhang, Yajie, additional, Liu, Yanan, additional, Shi, Yanan, additional, Qiu, Dingding, additional, Deng, Dan, additional, Zhang, Jianqi, additional, Wang, Boxin, additional, Adil, Muhammad Abdullah, additional, Amin, Kamran, additional, Memon, Waqar Ali, additional, Wang, Mengni, additional, Zhou, Huiqiong, additional, Zhang, Xinghua, additional, and Wei, Zhixiang, additional

Published
2022
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16. Improving the efficiency of ternary organic solar cells by reducing energy lossElectronic supplementary information (ESI) available. See DOI: https://doi.org/10.1039/d3nh00122a

Author

Wang, Mengni, Shi, Yanan, Zhang, Ziqi, Shen, Yifan, Lv, Min, Yan, Yangjun, Zhou, Huiqion, Zhang, Jianqi, Lv, Kun, Zhang, Yajie, Peng, Hailin, and Wei, Zhixiang

Abstract

Effectively reducing the voltage loss in organic solar cells (OSCs) is critical to improving the power conversion efficiency (PCE) of OSCs. In this study, highly efficient ternary OSCs were constructed by adding a non-fullerene acceptor Qx2 with a high open-circuit voltage (VOC) and low energy loss (Eloss) into PM6:m-BTP-PhC6 based binary devices. The third component Qx2 shows slightly complementary absorption with m-BTP-PhC6 and also optimizes the molecular packing, orientation, and morphology of the active layer. Moreover, the incorporation of Qx2 reduced the energetic disorder and improved the electroluminescence quantum efficiency, which suppresses the Elossand further leads to a higher VOCthan the PM6:m-BTP-PhC6 binary blend. Consequently, synergetic enhancements of VOC, short circuit current (JSC), and fill factor (FF) are realized, resulting in the PCE of 18.60%. This work shows that the selection of the appropriate third component has positive implications for reducing Elossand improving the PCE of OSCs.

Published
2023
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17. Simultaneously Decreasing the Bandgap and Voc Loss in Efficient Ternary Organic Solar Cells.

Author

Yan, Yangjun, Zhang, Yajie, Liu, Yanan, Shi, Yanan, Qiu, Dingding, Deng, Dan, Zhang, Jianqi, Wang, Boxin, Adil, Muhammad Abdullah, Amin, Kamran, Memon, Waqar Ali, Wang, Mengni, Zhou, Huiqiong, Zhang, Xinghua, and Wei, Zhixiang

Subjects
*SOLAR cells, *ENERGY dissipation, *OPEN-circuit voltage, *QUANTUM efficiency, *SHORT-circuit currents
Abstract

Ternary architecture is a promising strategy to further boost the performance of organic solar cells (OSCs). Reducing the bandgap of the active layer materials not only widens the absorption wavelength range and enhances the short‐circuit current (Jsc) of the OSC, but also decreases the open‐circuit voltage (Voc) of the device, leading to a trade‐off situation for the optimization of the material system. Herein, a small‐molecule donor BTID‐2F, featuring a narrower bandgap than that of PM6, is introduced into a PM6:Y6 based system. The redshift in external quantum efficiency indicates the narrower bandgap and better aggregation in the ternary blends than those of binary ones. Interestingly, lower energy disorder and energy loss are also attained for the ternary devices, leading to higher Voc. Furthermore, owing to the suppressed recombination and morphological optimization, a simultaneous enhancement in the Jsc and fill factor boosts the power conversion efficiency (PCE) of ternary OSC to 17.9% compared to 16.62% for the binary device. Likewise, replacing the acceptor with the L8‐BO molecule further improves the ternary PCE to 18.52%. This work indicates an emerging approach for fabricating high‐performance ternary OSCs with a decreased bandgap and increased Voc. [ABSTRACT FROM AUTHOR]

Published
2022
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