Interface engineering of perovskite solar cells with PEO for improved performance

被引：62

作者：

Dong, H. P. ^{[1
]}

Li, Y. ^{[2
,3
]}

Wang, S. F. ^{[2
,3
]}

Li, W. Z. ^{[1
]}

Li, N. ^{[1
]}

Guo, X. D. ^{[1
]}

Wang, L. D. ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Minist Educ, Key Lab Organ Optoelect & Mol Engn, Beijing 100084, Peoples R China

[2] Peking Univ, Sch Phys, Inst Modern Opt, Beijing 100871, Peoples R China

[3] Peking Univ, Sch Phys, State Key Lab Artificial Microstruct & Mesoscop P, Beijing 100871, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 18期

基金：

中国国家自然科学基金;

关键词：

ORGANOMETAL HALIDE PEROVSKITES; LAYER; RECOMBINATION; CH3NH3PBI3; DEPOSITION; TRANSPORT; BLOCKING;

D O I：

10.1039/c5ta00407a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Interface engineering is an important and efficient way to further improve the conversion efficiency of perovskite solar cells. In this study, we report the modification of the electron transport layer (ETL) using a thin layer of PEO. Characterizations showed that PEO was uniformly coated on top of the original TiOx ETL, without resulting in an evident change of the surface morphology, hydrophilic ability or transparency. With the interface dipole formed at the interface, the work function of the ETL greatly decreased. Compared with devices with TiOx only, devices based on the modified ETL gave a nearly 15% enhancement to the overall conversion efficiency, with both V-oc and J(sc) improved. Further studies showed that the improved performance could mainly be attributed to the better retardation of back recombination and the enhanced electron collection efficiency bymeans of the PEO thin layer modification.

引用

页码：9999 / 10004

页数：6

共 27 条

[11] Parameters Affecting I-V Hysteresis of CH3NH3PbI3 Perovskite Solar Cells: Effects of Perovskite Crystal Size and Mesoporous TiO2 Layer [J].