Photovoltage Approaching 0.9 V for Planar Heterojunction Silver Bismuth Iodide Solar Cells with Li-TFSI Additive

被引：59

作者：

Zhang, Qiaohui ^{[1
,2
]}

Wu, Cuncun ^{[1
,2
]}

Qi, Xin ^{[1
,2
]}

Lv, Fang ^{[1
,2
]}

Zhang, Zehao ^{[1
,2
]}

Liu, Yang ^{[1
,2
]}

Wang, Shufeng ^{[1
,2
]}

Qu, Bo ^{[1
,2
]}

Chen, Zhijian ^{[1
,2
]}

Xiao, Lixin ^{[1
,2
]}

机构：

[1] Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China

[2] Peking Univ, Dept Phys, Beijing 100871, Peoples R China

来源：

ACS APPLIED ENERGY MATERIALS | 2019年 / 2卷 / 05期

基金：

中国国家自然科学基金;

关键词：

silver bismuth iodide; planar heterojunction; solar cells; film growth; lead-free; CRYSTAL-STRUCTURE; AGBI2I7;

D O I：

10.1021/acsaem.9b00366

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：

Silver bismuth iodide (Ag-Bi-I) as an environmentally friendly semiconductor with suitable band gap and high stability has been regarded as a potential photovoltaic material, while the reported mesoscopic devices all showed poor open circuit voltage (V-oc) of 0.5-0.6 V. Here, we successfully fabricated AgBiI4 planar heterojunction solar cells via a solution method with a Voc approaching 0.9 V, in which 2 wt % lithium bis(trifluoromethylsulfonyl)-imide (Li-TFSI) was added into the AgI:BiI3 precursor. The device presents a power conversion efficiency of 2.50 +/- 0.20% with a V-oc of 0.82 +/- 0.20 V. Experimental results indicated that the readily coordinated component in the organic salt, TFSI-, could assist film growth and result in a full coverage morphology. Furthermore, double layer devices showed the carrier separation occurred in the interface of SnO2/AgBiI4. These results indicated interface extraction and film enhancement should be concerned in further improvements.

引用

页码：3651 / +

页数：11

共 22 条

[21] Recent progress in lead-free perovskite (-like) solar cells [J].

Zhang, Qiaohui ;

Ting, Hungkit ;

Wei, Shiyuan ;

Huang, Daiqiang ;

Wu, Cuncun ;

Sun, Weihai ;

Qu, Bo ;

Wang, Shufeng ;

Chen, Zhijian ;

Xiao, Lixin .

MATERIALS TODAY ENERGY, 2018, 8 :157-165

[22] High-Quality (CH3NH3)3Bi2I9 Film-Based Solar Cells: Pushing Efficiency up to 1.64% [J].

Zhang, Zheng ;

Li, Xiaowei ;

Xia, Xiaohong ;

Wang, Zhuo ;

Huang, Zhongbing ;

Lei, Binglong ;

Gao, Yun .

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2017, 8 (17) :4300-4307

← 1 2 3 →