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8 results on '"Sun, Derun"'

2. Suppressed Phase Segregation with Small A‐Site and Large X‐Site Incorporation for Photostable Wide‐Bandgap Perovskite Solar Cells

Author

Sun, Huande, primary, Liu, Sanwan, additional, Liu, Xiaoxuan, additional, Gao, You, additional, Wang, Jianan, additional, Shi, Chenyang, additional, Raza, Hasan, additional, Sun, Zhenxing, additional, Pan, Yongyan, additional, Cai, Yong, additional, Zhang, Siqi, additional, Sun, Derun, additional, Chen, Wei, additional, and Liu, Zonghao, additional

Published
2024
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3. Chemical Reduction of Iodine Impurities and Defects with Potassium Formate for Efficient and Stable Perovskite Solar Cells.

Author

Sun, Derun, Gao, You, Raza, Hasan, Liu, Sanwan, Ren, Fumeng, Hu, Xiaodong, Wang, Haixin, Meng, Xin, Wang, Jianan, Chen, Rui, Sun, Huande, He, Jizhou, Zhou, Jing, Pan, Yongyan, Sun, Zhenxing, Chen, Wei, and Liu, Zonghao

Subjects
*SOLAR cells, *CHEMICAL reduction, *PEROVSKITE, *IODINE, *POTASSIUM, *ALKALI metals, *ALKALI metal ions
Abstract

The performance of perovskite solar cells (PSCs) is negatively affected by iodine (I2) impurities generated from the oxidation of iodide ions in the perovskite precursor powder, solution, and perovskite films. In this study, the use of potassium formate (HCOOK) as a reductant to minimize the presence of detrimental I2 impurities is presented. It is demonstrated that HCOOK can effectively reduce I2 back to I− in the precursor solution as well as in the devices under external conditions. Furthermore, the introduced formate anion (HCOO−) and alkali metal cation (K+) can reduce the defect density within the perovskite film by modulating perovskite growth and passivating electronic defects, significantly prolonging the carrier lifetime and reducing the J–V hysteresis. Consequently, the maximum efficiency of the HCOOK‐doped planar n–i–p PSCs reaches 23.8%. After 1000 h of operation at maximum power point tracking under continuous 1 sun illumination, the corresponding encapsulated devices retain 94% of their initial efficiency. [ABSTRACT FROM AUTHOR]

Published
2023
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4. Effective Inhibition of Phase Segregation in Wide‐Bandgap Perovskites with Alkali Halides Additives to Improve the Stability of Solar Cells

Author

Meng, Xin, primary, Wang, Jianan, additional, Wang, Haixin, additional, Li, Mengjie, additional, Sun, Derun, additional, Hu, Xiaodong, additional, He, Jizhou, additional, Yu, Peng, additional, Zhou, Jing, additional, Chen, Rui, additional, Ren, Fumeng, additional, Liu, Sanwan, additional, Zhang, Shasha, additional, Zhang, Yiqiang, additional, Zhao, Zhiguo, additional, Liu, Zonghao, additional, and Chen, Wei, additional

Published
2023
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5. Elimination of unstable residual lead iodide near the buried interface for the stability improvement of perovskite solar cells

Author

Liu, Zonghao, primary, Gao, You, additional, Ren, Fumeng, additional, Sun, Derun, additional, Li, Sibo, additional, Zheng, Guanhaojie, additional, Wang, Jianan, additional, Raza, Hasan, additional, Chen, Rui, additional, Wang, Haixin, additional, Liu, Sanwan, additional, Yu, Peng, additional, Meng, Xin, additional, He, Jizhou, additional, Zhou, Jing, additional, Hu, Xiaodong, additional, Zhang, Zhengpin, additional, Qiu, Longbin, additional, and Chen, Wei, additional

Published
2023
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8. Strain Release of Formamidinium-Cesium Perovskite with Imprint-Assisted Organic Ammonium Halide Compensation for Efficient and Stable Solar Cells

Author

Hu, Xiaodong, primary, Zhu, Cheng, additional, Zhang, Wenjun, additional, Wang, Haixin, additional, Wang, Jianan, additional, Ren, Fumen, additional, Chen, Rui, additional, Liu, Sanwan, additional, Meng, Xin, additional, Zhou, Jing, additional, Pan, Yongyan, additional, Tian, Xueying, additional, Sun, Derun, additional, Zhang, Shasha, additional, Zhang, Yiqiang, additional, Liu, Zonghao, additional, Chen, Qi, additional, and Chen, Wei, additional

Published
2022
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