文献类型：期刊文献

英文题名：Improving Buried Interface Contact by Bidentate Anchoring for Inverted Perovskite Solar Cells

作者：Chen, Xian-Min[1,2,3];Ye, Yong-Chun[1];Feng, Shi-Chi[4];Lv, Bing-Hao[2,3];Wang, Jiang-Ying[1];Tang, Jian-Xin[4,5];Dou, Wei-Dong[2,3]

机构：[1]China Jiliang Univ, Coll Mat & Chem, Hangzhou 310018, Zhejiang, Peoples R China;[2]Shaoxing Univ, Lab Low Dimens Carbon Mat, Shaoxing 312000, Zhejiang, Peoples R China;[3]Shaoxing Univ, Dept Phys, Shaoxing 312000, Zhejiang, Peoples R China;[4]Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Suzhou 215123, Jiangsu, Peoples R China;[5]Macau Univ Sci & Technol, Macao Inst Mat Sci & Engn MIMSE, Fac Innovat Engn, Taipa 999078, Macau, Peoples R China

年份：2024

外文期刊名：SMALL

收录：SCI-EXPANDED(收录号：WOS:001223486400001)、、EI(收录号：20242016102185)、Scopus(收录号：2-s2.0-85193060200)、WOS

基金：This work was financially supported by the National Natural Science Foundation of China (No. 62320106004). The authors also acknowledge financial support from startup capital at the China Jiliang University (No. 220971).

语种：英文

外文关键词：bidentate ligands; buried interface modification; defect passivation; inverted perovskite solar cells

外文摘要：Nickel oxide (NiOx) is a promising hole transport layer (HTL) to fabricate efficient and large-scale inverted perovskite solar cells (PSCs) due to its low cost and superior chemical stability. However, inverted PSCs based on NiOx are still lagging behind that of other HTL because of the poor quality of buried interface contact. Herein, a bidentate ligand, 4,6-bis (diphenylphosphino) phenoxazine (2DPP), is used to regulate the NiOx surface and perovskite buried interface. The diphosphine Lewis base in the 2DPP molecule can coordinate both with NiOx and lead ions at NiOx/perovskite interface, leading to high-quality perovskite films with minimized defects. It is found that the inverted PSCs with 2DPP-modified buried interface exhibit double advantages of being both fast charge extraction and reduced nonradiative recombination, which is a combination of multiple factors including favorable energetic alignment, improved interface contact and strong binding between NiOx/2DPP and perovskite. The optimal PSC based on 2DPP modification yields a champion power conversion efficiency (PCE) of 21.9%. The unencapsulated PSC maintains above 75% of its initial PCE in the air with a relative humidity (RH) of 30-40% for 1000 h. A favorable buried interface is developed by the designed bidentate ligand (4,6-bis (diphenylphosphino) phenoxazine, 2DPP) to construct a homogeneous buried interface, reduce defect-induced recombination, and enhance interfacial carrier transport. The perovskite solar cells obtain a power conversion efficiency (PCE) of 21.9%. In addition, the device with 2DPP modification also exhibits excellent stability. image