journal article·2018-04-13Open access

Low-Temperature Nb-Doped SnO2 Electron-Selective Contact Yields over 20% Efficiency in Planar Perovskite Solar Cells

Elham Halvani Anaraki, Ahmad Kermanpur, Matthew T. Mayer, Ludmilla Steier, Taha Ahmed, Silver-Hamill Turren-Cruz, Jiyoun Seo, Jingshan Luo, Shaik Mohammad Zakeeruddin, Wolfgang Richard Tress, Tomas Edvinsson, Michael Grätzel, Anders Hagfeldt, Juan-Pablo Correa-Baena

ACS Energy Letters· Volume 3· Issue 4

Abstract

Low-temperature planar organic–inorganic lead halide perovskite solar cells have been at the center of attraction as power conversion efficiencies go beyond 20%. Here, we investigate Nb doping of SnO2 deposited by a low-cost, scalable chemical bath deposition (CBD) method. We study the effects of doping on compositional, structural, morphological, and device performance when these layers are employed as electron-selective layers (ESLs) in planar-structured PSCs. We use doping concentrations of 0, 1, 5, and 10 mol % Nb to Sn in solution. The ESLs were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, atomic force microscopy, and ultraviolet–visible spectroscopy. ESLs with an optimum 5 mol % Nb doping yielded, on average, an improvement of all the device photovoltaic parameters with a champion power conversion efficiency of 20.5% (20.1% stabilized).
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Laboratory of Photomolecular Science, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland

Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran

Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland

Young Investigator Group Electrochemical Conversion of CO2, Helmholtz Zentrum Berlin, Hahn-Meitner-Platz 1, 14109 Berlin, Germany

Department of Chemistry, Imperial College London, Kensington, London SW7 2AZ, U.K.

Department of Chemistry, Ångström Laboratory, Structural Chemistry, Uppsala University, 752 36 Uppsala, Sweden

Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States

Funding

Isfahan University of Technology · Ministry of Science Research and Technology · Iran Nanotechnology Initiative Council

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