Realization of Moisture-Resistive Perovskite Films for Highly Efficient Solar Cells Using Molecule Incorporation

被引：15

作者：

Azam, Muhammad ^{[1
,2
,3
]}

Yue, Shizhong ^{[1
,2
]}

Xu, Rui ^{[4
,5
]}

Yang, Shuaijian ^{[1
,2
]}

Liu, Kong ^{[1
,2
]}

Huang, Yanbin ^{[1
,2
]}

Sun, Yang ^{[1
,2
]}

Hassan, Ali ^{[6
,7
]}

Ren, Kuankuan ^{[1
,2
]}

Tan, Furui ^{[8
]}

Wang, Zhijie ^{[1
,2
]}

Lei, Yong ^{[4
,5
]}

Qu, Shengchun ^{[1
,2
]}

Wang, Zhanguo ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Semicond, Beijing Key Lab Low Dimens Semicond Mat & Devices, Key Lab Semicond Mat Sci, Beijing 100083, Peoples R China

[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

[3] Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen Key Lab Adv Thin Films & Applicat, Shenzhen 518060, Peoples R China

[4] Tech Univ Ilmenau, Inst Phys, D-98693 Ilmenau, Germany

[5] Tech Univ Ilmenau, IMN MacroNano ZIK, D-98693 Ilmenau, Germany

[6] Shenzhen Univ, Key Lab Optoelect Devices & Syst Guangdong Prov, Shenzhen 518060, Peoples R China

[7] Shenzhen Univ, Minist Educ, Coll Phys & Optoelect Engn, Shenzhen 518060, Peoples R China

[8] Henan Univ, Dept Phys & Elect, Key Lab Photovolta Mat, Kaifeng 475004, Henan, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2020年 / 12卷 / 35期

基金：

中国国家自然科学基金;

关键词：

IT-4F; stability; defect states; hysteresis; crystallization; ORGANIC-CATION; ELECTRON; PERFORMANCE; LENGTHS; ENHANCEMENT; MANAGEMENT; STABILITY; ACCEPTOR; DEFECTS; IMPACT;

D O I：

10.1021/acsami.0c09046

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The development of highly crystalline perovskite films with large crystal grains and few surface defects is attractive to obtain high-performance perovskite solar cells (PSCs) with good device stability. Herein, we simultaneously improve the power conversion efficiency (PCE) and humid stability of the CH3NH3PbI3 (CH3NH3 = MA) device by incorporating small organic molecule IT-4F into the perovskite film and using a buffer layer of PFN-Br. The presence of IT-4F in the perovskite film can successfully improve crystallinity and enhance the grain size, leading to reduced trap states and longer lifetime of the charge carrier, and make the perovskite film hydrophobic. Meanwhile, as a buffer layer, PFN-Br can accelerate the separation of excitons and promote the transfer process of electrons from the active layer to the cathode. As a consequence, the PSCs exhibit a remarkably improved PCE of 20.55% with reduced device hysteresis. Moreover, the moisture-resistive film-based devices retain about 80% of their initial efficiency after 30 days of storage in relative humidity of 10-30% without encapsulation.

引用

页码：39063 / 39073

页数：11

共 56 条

[21] Large Piezoelectric Effect in a Lead-Free Molecular Ferroelectric Thin Film [J].