Piperazine-Assisted Construction of 2D/3D Wide-Bandgap Perovskite for Realizing High-Efficiency Perovskite/Organic Tandem Solar Cells

被引：5

作者：

Wang, Ziyue ^{[1
]}

Kang, Shuaiqing ^{[1
]}

Zhou, Xia ^{[1
]}

Chen, Haiyang ^{[1
]}

Jiang, Xingxing ^{[4
]}

Zhang, Zhichao ^{[1
]}

Zheng, Jialei ^{[1
]}

Zhang, Ruopeng ^{[1
]}

Chen, Weijie ^{[1
]}

Zhang, Jiandong ^{[3
]}

Li, Yaowen ^{[1
,2
,3
]}

机构：

[1] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Suzhou Key Lab Novel Semicond Mat & Devices, Lab Adv Optoelect Mat, Suzhou 215123, Jiangsu, Peoples R China

[2] Soochow Univ, Jiangsu Key Lab Adv Negat Carbon Technol, Suzhou 215123, Jiangsu, Peoples R China

[3] Soochow Univ, Coll Chem Chem Engn & Mat Sci, State & Local Joint Engn Lab Novel Funct Polymer M, Jiangsu Key Lab Adv Funct Polymer Design & Applica, Suzhou 215123, Jiangsu, Peoples R China

[4] Hengyang Normal Univ, Coll Phys & Elect Engn, Hengyang 421002, Hunan, Peoples R China

来源：

CHINESE JOURNAL OF CHEMISTRY | 2024年 / 42卷 / 16期

基金：

中国国家自然科学基金;

关键词：

Perovskite/organic tandem solar cell; Defect states; Piperazine ion salt; Energy conversion; Low-dimensional materials; Perovskite solar cells; 2D/3D perovskites; Efficiency;

D O I：

10.1002/cjoc.202400071

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Monolithic perovskite/organic tandem solar cells (TSCs) have gained significant attention due to their easy device integration and the potential to surpass the Shockley-Queisser limit of single-junction solar cells. However, the surfaces of wide-bandgap perovskite films are densely populated with defects, leading to severe non-radiative recombination and energy loss. As a consequence, the power conversion efficiency (PCE) of perovskite/organic TSCs lags behind that of other TSC counterparts. To address these issues, we designed a functional ammonium salt, 4-(2-hydroxyethyl)piperazin-1-ium iodide (PZOI), comprising a piperazine iodide and a terminated hydroxyl group, which was applied for post-treating the perovskite surface. Our findings reveal that PZOI reacts with and consumes residual PbX2 (X: I or Br) to form a 2D perovskite component, thereby eliminating Pb0 defects, while the terminated hydroxyl group in PZOI can also passivate uncoordinated Pb2+. Consequently, the shallow/deep-level defect densities of the 2D/3D perovskite film were significantly reduced, leading to an enhanced PCE of single-junction 2D/3D wide-bandgap perovskite solar cells to 18.18% with a reduced energy loss of 40 meV. Importantly, the corresponding perovskite/organic TSCs achieved a remarkable PCE of 24.05% with enhanced operational stability (T90 similar to 500 h).

引用

页码：1819 / 1827

页数：9

共 35 条

[1] Surface Reconstruction for Stable Monolithic All-Inorganic Perovskite/Organic Tandem Solar Cells with over 21% Efficiency [J].