Lookup NU author(s): Dr Pablo Docampo
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).
Recently developed organic-inorganic hybrid perovskite solar cells combine low-cost fabrication and high power conversion efficiency. Advances in perovskite film optimization have led to an outstanding power conversion efficiency of more than 20%. Looking forward, shifting the focus toward new device architectures holds great potential to induce the next leap in device performance. Here, we demonstrate a perovskite/perovskite heterojunction solar cell. We developed a facile solution-based cation infiltration process to deposit layered perovskite (LPK) structures onto methylammonium lead iodide (MAPI) films. Grazing-incidence wide-angle X-ray scattering experiments were performed to gain insights into the crystallite orientation and the formation process of the perovskite bilayer. Our results show that the self-assembly of the LPK layer on top of an intact MAPI layer is accompanied by a reorganization of the perovskite interface. This leads to an enhancement of the open-circuit voltage and power conversion efficiency due to reduced recombination losses, as well as improved moisture stability in the resulting photovoltaic devices.
Author(s): Hu Y, Schlipf J, Wussler M, Petrus ML, Jaegermann W, Bein T, Mueller-Buschbaum P, Docampo P
Publication type: Article
Publication status: Published
Journal: ACS Nano
Print publication date: 28/06/2016
Online publication date: 26/05/2016
Acceptance date: 26/05/2016
Date deposited: 07/10/2016
ISSN (print): 1936-0851
ISSN (electronic): 1936-086X
Publisher: American Chemical Society
PubMed id: 27228558
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