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Hybrid Perovskite/Perovskite Heterojunction Solar Cells

Lookup NU author(s): Dr Pablo Docampo

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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).

Abstract

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.

Publication metadata

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

Year: 2016

Volume: 10

Issue: 6

Pages: 5999-6007

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

URL: http://dx.doi.org/10.1021/acsnano.6b01535

DOI: 10.1021/acsnano.6b01535

PubMed id: 27228558

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