Highly Efficient and Stable 2D Dion Jacobson/3D Perovskite Heterojunction Solar Cells

被引：26

作者：

Yukta ^{[1
]}

Parikh, Nishi ^{[2
]}

Chavan, Rohit D. ^{[1
]}

Yadav, Pankaj ^{[2
]}

Nazeeruddin, Mohammad Khaja ^{[3
]}

Satapathi, Soumitra ^{[1
]}

机构：

[1] Indian Inst Technol Roorkee, Dept Phys, Roorkee 247667, Uttarakhand, India

[2] Pandit Deendayal Energy Univ, Sch Technol, Dept Solar Energy, Gandhinagar 382007, Gujarat, India

[3] Ecole Polytech Fed Lausanne EPFL Valais Wallis, Inst Chem Sci & Engn, Grp Mol Engn Funct Mat, CH-1951 Sion, Switzerland

来源：

ACS APPLIED MATERIALS & INTERFACES | 2022年

关键词：

two-dimensional perovskite; 2D/3D perovskite heterostructures; power conversion efficiency; defect passivation; additive engineering; stability; SUPPRESSED ION MIGRATION; PERFORMANCE; PASSIVATION; DEGRADATION;

D O I：

10.1021/acsami.2c04455

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Heterostructures involving two-dimensional/three-dimensional (2D/3D) perovskites have recently attracted increased attention due to their ability to combine the high photovoltaic performance of 3D perovskites with the increased stability of 2D perovskites. Here we report ammonium thiocyanate (NH4SCN) passivated 3D methylammonium lead triiodide (MAPbI(3)) perovskite active layer and deposition of 2D perovskite capping layer using xylylene diammonium iodide (XDAI) organic cation. The 2D/3D perovskite heterojunction formation is probed by using FESEM and UPS spectroscopy. The NH4SCN passivated MAPbI(3) perovskite has shown 19.6% PCE compared to the 17.18% PCE of pristine MAPbI(3) perovskite solar cells (PSCs). Finally, the champion 2D/3D perovskite heterojunction based solar cells have achieved the remarkable PCE of 20.74%. The increased PCE in 2D/3D PSCs is mainly attributed to the reduced defect density and suppressed nonradiative recombination losses. Moreover, the hydrophobic 2D capping layer endows the 2D/3D heterojunction perovskites with exceptional moisture, thermal and UV stability, highlighting the promise of highly stable and efficient 2D/3D PSCs.

引用

页码：29744 / 29753

页数：10

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