Gold and iodine diffusion in large area perovskite solar cells under illumination

被引：144

作者：

Cacovich, S. ^{[1
]}

Cina, L. ^{[2
,3
]}

Matteocci, F. ^{[2
]}

Divitini, G. ^{[1
]}

Midgley, P. A. ^{[1
]}

Di Carlo, A. ^{[2
]}

Ducati, C. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Mat Sci & Met, 27 Charles Babbage Rd, Cambridge CB3 0FS, England

[2] Univ Roma Tor Vergata, Dept Elect Engn, CHOSE, Via Politecn 1, I-00133 Rome, Italy

[3] Cicci Res Srl, Via Giordania 227, I-58100 Grosseto, Italy

来源：

NANOSCALE | 2017年 / 9卷 / 14期

关键词：

HOLE-TRANSPORTING MATERIAL; INDUCED DEGRADATION; STABILITY; RECOMBINATION; NANOPARTICLES; ENHANCEMENT; LAYER;

D O I：

10.1039/c7nr00784a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Operational stability is the main issue hindering the commercialisation of perovskite solar cells. Here, a long term light soaking test was performed on large area hybrid halide perovskite solar cells to investigate the morphological and chemical changes associated with the degradation of photovoltaic performance occurring within the devices. Using Scanning Transmission Electron Microscopy (STEM) in conjunction with EDX analysis on device cross sections, we observe the formation of gold clusters in the perovskite active layer as well as in the TiO2 mesoporous layer, and a severe degradation of the perovskite due to iodine migration into the hole transporter. All these phenomena are associated with a drastic drop of all the photovoltaic parameters. The use of advanced electron microscopy techniques and data processing provides new insights on the degradation pathways, directly correlating the nanoscale structure and chemistry to the macroscopic properties of hybrid perovskite devices.

引用

页码：4700 / 4706

页数：7

共 49 条

[1] Graphene-Perovskite Solar Cells Exceed 18% Efficiency: A Stability Study [J].