Issue 14, 2019

Efficient methylammonium lead trihalide perovskite solar cells with chloroformamidinium chloride (Cl-FACl) as an additive

Abstract

Mixed halide perovskite (MAPbI3−xClx) solar cells have been widely researched because of their excellent photoelectronic properties. However, Cl doping is difficult to obtain due to the low formation energy and low boiling point of MAPbCl3 which can decompose into PbCl2 and MACl. MACl can leave the perovskite film during the annealing process leading to the loss of Cl and undesirable pinholes or cracks. Here, we present the chloroformamidinium chloride (Cl-FACl) as a “stabilizer” to stabilize Cl ions and thus restrain the removal of Cl avoiding the undesirable defects. With the introduction of Cl-FACl, improvement of film quality and reduction of defects result in a longer TRPL decay time and thus more stable devices. High-efficiency methylammonium lead trihalide (MAPbI3−xClx) perovskite solar cells with an efficiency up to 20.36% have been achieved with negligible hysteresis.

Graphical abstract: Efficient methylammonium lead trihalide perovskite solar cells with chloroformamidinium chloride (Cl-FACl) as an additive

Supplementary files

Article information

Article type
Communication
Submitted
02 Feb 2019
Accepted
02 Mar 2019
First published
09 Mar 2019

J. Mater. Chem. A, 2019,7, 8078-8084

Efficient methylammonium lead trihalide perovskite solar cells with chloroformamidinium chloride (Cl-FACl) as an additive

Y. Wu, X. Li, S. Fu, L. Wan and J. Fang, J. Mater. Chem. A, 2019, 7, 8078 DOI: 10.1039/C9TA01319A

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