Issue 6, 2017

Interface modification effects using a halide-free lead source for perovskite solar cells

Abstract

The remnant PbI2 at the mesoporous-TiO2 (m-TiO2)/CH3NH3PbI3 interface can act as an interface modification layer for high-efficiency perovskite solar cells (PSCs). In this study, we adopted Pb(CH3COO)2·3H2O (PbAc2) to control the amount of remnant PbI2 at the m-TiO2/CH3NH3PbI3 interface. The characterization results demonstrate that the amount of remnant PbI2 could be controlled by the concentration of PbAc2 solution without influencing the crystallographic textures of CH3NH3PbI3 films. By adjusting the PbAc2 solution concentration, the optimized PSC can achieve a 15% enhancement of PCE in the case of using a two-step method for CH3NH3PbI3 preparation. Under the circumstances of using an anti-solution method, it still displayed a 10% enhancement of the average PCE for 10 individual PSCs with PbAc2 (13.6% to 15.0%). The steady-state photoluminescence (PL), time-resolved photoluminescence (TR-PL) and open-circuit voltage decay results demonstrated that the remnant PbI2 could reduce carrier recombination at the m-TiO2/CH3NH3PbI3 interface. Meanwhile, the enhancement of the open-circuit voltage was achieved for PSCs with PbAc2.

Graphical abstract: Interface modification effects using a halide-free lead source for perovskite solar cells

Supplementary files

Article information

Article type
Paper
Submitted
14 Apr 2017
Accepted
22 May 2017
First published
22 May 2017

Sustainable Energy Fuels, 2017,1, 1358-1365

Interface modification effects using a halide-free lead source for perovskite solar cells

L. Xiao, J. Xu, J. Chen, J. Luan, Y. Yang, B. Zhang, J. Yao and S. Dai, Sustainable Energy Fuels, 2017, 1, 1358 DOI: 10.1039/C7SE00200A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements