Enhanced electronic properties in mesoporous TiO2 via lithium doping for high-efficiency perovskite solar cells

被引：761

作者：

Giordano, Fabrizio ^{[1
]}

Abate, Antonio ^{[1
]}

Baena, Juan Pablo Correa ^{[2
]}

Saliba, Michael ^{[3
]}

Matsui, Taisuke ^{[4
]}

Im, Sang Hyuk ^{[5
]}

Zakeeruddin, Shaik M. ^{[1
]}

Nazeeruddin, Mohammad Khaja ^{[3
]}

Hagfeldt, Anders ^{[2
]}

Graetzel, Michael ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Sch Basic Sci, Inst Chem Sci & Engn, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland

[2] Ecole Polytech Fed Lausanne, Sch Basic Sci, Inst Chem Sci & Engn, Lab Sci Photomol, CH-1015 Lausanne, Switzerland

[3] Ecole Polytech Fed Lausanne, Sch Basic Sci, Inst Chem Sci & Engn, Grp Mol Engn Funct Mat, CH-1015 Lausanne, Switzerland

[4] Panasonic Corp, Adv Res Div, Mat Res Lab, 1006 Kadoma, Kadoma, Osaka 5718501, Japan

[5] Kyung Hee Univ, Dept Chem Engn, 1732 Deogyeong Daero, Yongin 446701, Gyeonggi Do, South Korea

来源：

NATURE COMMUNICATIONS | 2016年 / 7卷

关键词：

LEAD IODIDE PEROVSKITES; NB-DOPED TIO2; CHARGE-TRANSPORT; HALIDE PEROVSKITES; SENSITIZED TIO2; PERFORMANCE; RECOMBINATION; LENGTHS; TRIHALIDE; DOPANTS;

D O I：

10.1038/ncomms10379

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Perovskite solar cells are one of the most promising photovoltaic technologies with their extraordinary progress in efficiency and the simple processes required to produce them. However, the frequent presence of a pronounced hysteresis in the current voltage characteristic of these devices arises concerns on the intrinsic stability of organo-metal halides, challenging the reliability of technology itself. Here, we show that n-doping of mesoporous TiO2 is accomplished by facile post treatment of the films with lithium salts. We demonstrate that the Li-doped TiO2 electrodes exhibit superior electronic properties, by reducing electronic trap states enabling faster electron transport. Perovskite solar cells prepared using the Li-doped films as scaffold to host the CH3NH3PbI3 light harvester produce substantially higher performances compared with undoped electrodes, improving the power conversion efficiency from 17 to over 19% with negligible hysteretic behaviour (lower than 0.3%).

引用

页数：6

共 58 条

[1] An Organic "Donor-Free" Dye with Enhanced Open-Circuit Voltage in Solid-State Sensitized Solar Cells [J].