Hybrid perovskite/perovskite heterojunction solar cells

Hu, Y., Schlipf, J., Wussler, M., Petrus, M. L., Jaegermann, W., Bein, T., Müller-Buschbaum, P. and Docampo, P. (2016) Hybrid perovskite/perovskite heterojunction solar cells. ACS Nano, 10(6), pp. 5999-6007. (doi: 10.1021/acsnano.6b01535) (PMID:27228558)

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.

• Item Type: Articles
• Additional Information: The authors thank S. Schmidt from the Chemistry Department of LMU Munich for scanning electron microscopy measurements. This project was financed by a grant from the German Federal Ministry of Education and Research (BMBF) under the agreement number 01162525/1. The authors acknowledge funding from the Bavarian Collaborative Research Program “Solar Technologies Go Hybrid” (SolTech), the Center for NanoScience (CeNS), and the DFG Excellence Cluster “Nanosystems Initiative Munich” (NIM). P.D. acknowledges support from the European Union through the award of a Marie Curie Intra-European Fellowship.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Docampo, Dr Pablo
• Authors: Hu, Y., Schlipf, J., Wussler, M., Petrus, M. L., Jaegermann, W., Bein, T., Müller-Buschbaum, P., and Docampo, P.
• College/School: College of Science and Engineering > School of Chemistry
• Journal Name: ACS Nano
• Publisher: American Chemical Society
• ISSN: 1936-0851
• ISSN (Online): 1936-086X
• Published Online: 03 June 2016

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