Issue 40, 2017

A gradient engineered hole-transporting material for monolithic series-type large-area perovskite solar cells

Abstract

Further efficiency enhancement mainly relies on decreasing the interface losses between the active layers in perovskite solar cells. The design of a gradient engineered hole-transporting material is expected to tune the interface losses in perovskite solar cells. In this work, we reported gradient engineering that afforded the hole-transport material (spiro-OMeTAD) dispersed in the upper part of the perovskite layer. Photoluminescence measurements indicated an enhanced hole extraction from the perovskite–spiro-OMeTAD gradient film. And a maximum PCE of 19.16% and a steady-state efficiency of 18.01% were obtained for the small-area device. Furthermore, we assembled monolithic series-type large-area perovskite solar cells based on gradient engineering. The large-area perovskite solar cell with an active area of 1.01 cm2 obtained a PCE of 16.61%. Moreover, monolithic series-type large-area perovskite solar cells showed a Voc of 2.095 V for the binary module and a Voc of 3.104 V for the ternary module, respectively.

Graphical abstract: A gradient engineered hole-transporting material for monolithic series-type large-area perovskite solar cells

Supplementary files

Article information

Article type
Paper
Submitted
05 May 2017
Accepted
18 Jul 2017
First published
18 Jul 2017

J. Mater. Chem. A, 2017,5, 21161-21168

A gradient engineered hole-transporting material for monolithic series-type large-area perovskite solar cells

Y. Tu, J. Wu, X. He, P. Guo, T. Wu, H. Luo, Q. Liu, Q. Wu, J. Lin, M. Huang, Z. Lan and S. Li, J. Mater. Chem. A, 2017, 5, 21161 DOI: 10.1039/C7TA03890A

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