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电子传输层是钙钛矿太阳能电池的重要功能层，其表面及内部缺陷是限制钙钛矿太阳能电池性能提升的重要一环。双电子传输层（双ETL）策略虽然可以改善电子在功能层之间提取与传输，但是双ETL内部存在的独立界面以及不同ETL材料晶胞不匹配问题导致了额外的非辐射复合。基于此，本工作提出了将二[2-（（氧代）二苯基膦基）苯基]醚（DPEPO）引入到SnO2中设计混合电子传输层的策略，该策略在钝化SnO2中本征缺陷的同时，可以避免由于额外界面的存在而导致的缺陷态，有效改善了电子的提取与传输。并且进一步实现了对钙钛矿薄膜的结晶调控，提升钙钛矿太阳能电池性能，最终收获了基于宽带隙钙钛矿太阳能电池21.53%的功率转换率，其中，开路电压（VOC）达到了1.220 V，短路电流（JSC）为23.19 mA/cm2，填充因子（FF）高达76.11%。研究表明混合电子传输层策略可以有效优化载流子传输动力学，促进钙钛矿高质量结晶，对制备高性能太阳能电池具有一定指导意义。The electron transport layer is an important functional layer of perovskite solar cells, and its surface and internal defects are critical parts of limiting the performance improvement of perovskite solar cells. The double electron transport layer (double ETL) strategy enables effective passivation of the inherent defects in the electron transport layer (e.g., SnO2) and improves the extraction and transport of electrons between the functional layers, which provides an effective way for the development of high-efficiency and stable PSCs. However, due to the existence of independent interfaces within the dual ETL, the issue of cell mismatch of different ETL materials also leads to additional carrier defects, impeding the ongoing advancement of the dual ETL strategy.This work proposes a strategy to introduce di[2-((oxo) diphenylphosphino) phenyl]ether (DPEPO) into SnO2 ETL to design a hybrid electron transport layer strategy. Taking advantage of DPEPO's hole-blocking effect with higher HOMO energy levels and good electron transport ability, it successfully passivates the intrinsic defects in SnO2, while significantly improving the crystalline quality of the surface of the SnO2 film. So, avoiding the direct contact between the perovskite photoactive layer and the conductive substrate, which effectively improves the extraction and transport of electrons. Due to the preparation of high-quality electron transport layer, the crystalline regulation of perovskite thin film was further achieved to enhance the performance of perovskite solar cells, which finally harvested a power conversion rate of 21.53%, in which the open-circuit voltage (VOC) reached 1.220 V, the short-circuit current (JSC) was 23.19 mA/cm2, and the fill factor (FF) was 76.11%. This efficiency is 1.39% higher than that of the control one. It is shown that the hybrid electron transport layer strategy can not only optimize the carrier transport dynamics efficiently and significantly reduce the device performance affected by the defects in the functional layer, but also regulate the perovskite crystallization, which is promising for the preparation of high-performance solar cells.
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Keywords:
- perovskite /
- solar cell /
- electron transport layer /
- carrier composite /
- Defect Passivation
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[1] Kojima A,Teshima K,Shirai Y,Miyasaka T 2009 J. Am. Chem. Soc 131 6050
[2] Liang Z,Zhang Y,Xu H,Chen W,Liu B,Zhang J,Zhang H,Wang Z,Kang D H,Zeng J,Gao X,Wang Q,Hu H,Zhou H,Cai X,Tian X,Reiss P,Xu B,Kirchartz T,Xiao Z,Dai S,Park N G,Ye J,Pan X 2023 Nature 23 6784
[3] Deng K,Chen Q,Li L 2020 Adv. Funct. Mater. 30 2004209
[4] Lv J,Li H,Chen H,Ke L,Du W,Xiong J,Zhou C,Liu G 2023 Appl. Phys. Lett. 122 233501
[5] Dahal B,Guo R,Pathak R,Rezaee M D,Elam J W,Mane A U,Li W. J. Phys 2023 J Phys Chem Solids 181 111532
[6] Bai C,Dong W,Cai H Y,Zu C P,Yue W,Li H X,Zhao J,Huang F Z,Cheng Y B,Zhong J 2023 Adv. Energy Mater. 13 2300491
[7] Khan U,Iqbal T,Khan M,Wu R 2021 Sol Energy 223 346
[8] Gan Y,Qiu G,Qin B,Bi X,Liu Y,Nie G,Ning W,Yang R 2023 Nanomaterials 13 1313
[9] Zhang Y H,Xu L,Sun J,Wu Y J,Kan Z T,Zhang H,Yang L,Liu B,Dong B,Bai X,Song H W 2022 Adv. Energy Mater. 12 2201269
[10] Zhou Y,Ren X G,Yan Y Q,Ren H,Du H M,Cai X Y,Huang Z X 2022 Acta Phys. Sin. 71 208802 [周玚，任信钢，闫业强，任昊，杜红梅，蔡雪原，黄志祥 2022 物理学报 71 208802]
[11] Jang H J,Lee J Y 2019 J. Phys. Chem. C 123 26856
[12] Zhang J,Ding D X,Wei Y,Xu H 2016 Chem. Sci. 7 2870
[13] Fan W,Shen Y,Deng K,Chen Q,Bai Y,Li L 2022 Nano Energy 100 107518
[14] Zhao L,Tang P,Luo D,Dar M I,Eickemeyer F T,Arora N,Hu Q,Luo J,Liu Y,Zakeeruddin S M,Hagfeldt A,Arbiol J,Huang W,Gong Q,Russell T P,Friend R H,Grätzel M,Zhu R 2022 Sci. Adv. 8 eabo3733
[15] Hu P,Zhou W,Chen J,Xie X,Zhu J,Zheng Y,Li Y,Li J,Wei M 2024 Chem. Eng. J 480 148249
[16] Wu J,Li M H,Fan J T,Li Z,Fan X H,Xue D J,Hu J S 2023 J. Am. Chem. Soc. 145 5872
[17] Li X d,Zhang W X,Guo X M,Lu C y,Wei J Y,Fang J F 2022 Science 375 434
[18] Khan M T,Hemasiri N H,Kazim S,Ahmad S 2021 Sustainable Energy Fuels. 5 6352
[19] Cha J,Kim M K,Lee W,Jin H,Na H,Cung Tien Nguyen D,Lee S,Lim J,Kim M 2023 Chem. Eng. J 451 138920
[20] Tan H,Che F,Wei M,Zhao Y,Saidaminov M I,Todorović P,Broberg D,Walters G,Tan F,Zhuang T,Sun B,Liang Z,Yuan H,Fron E,Kim J,Yang Z,Voznyy O,Asta M,Sargent E H 2018 Nat. Commun 9 3100
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