Bismuth-Antimony mixed double perovskites Cs2AgBi1-xSbxBr6 in solar cells

被引：21

作者：

Pantaler, Martina ^{[1
,2
]}

Olthof, Selina ^{[3
]}

Meerholz, Klaus ^{[3
]}

Lupaseu, Doru C. ^{[1
,2
]}

机构：

[1] Univ Duisburg Essen, Inst Mat Sci, Univ Str 15, D-45151 Essen, Germany

[2] Univ Duisburg Essen, Ctr Nanoimegrat Duisburg Essen CENIDE, Univ Str 15, D-45151 Essen, Germany

[3] Univ Cologne, Dept Chem, Luxembourger Str 116, D-50939 Cologne, Germany

来源：

MRS ADVANCES | 2019年 / 4卷 / 64期

关键词：

thin film; photovoltaic; perovskites; morphology; grain size; CS2AGBIBR6;

D O I：

10.1557/adv.2019.404

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Reported conversion efficiencies of lead based perovskite solar cells keep increasing steadily. But next to the demand for high efficiency, the need for analogue non-toxic material systems remains. One promising lead free absorber material is the double perovskite Cs2AgBiBr6. Interest in this and other double perovskites has been increasing in the last three years and several solar cells using different device structures have been reported. However, the efficiency of these solar cells is merely in the range of 2%. To further improve solar cell performance we prepared mixed bismuth-antimony double perovskite Cs2AgBi1-xSbxBr6 where different fractions of antimony (x=0.125, 0.25, 0.375, 0.50) are used. This was motivated by reports of lower bandgap values in these mixed system. After the optimization of preparation of these thin films, we have carefully analysed the effects on the structure, composition, electronic structure, as well as optical properties. Finally, we have fabricated Bi-Sb mixed double perovskite solar cells in a mesoscopic device architecture.

引用

页码：3545 / 3552

页数：8

共 9 条

[1] Bandgap Engineering of Lead-Free Double Perovskite Cs2AgBiBr6 through Trivalent Metal Alloying [J].