journal article·2020-08-11Open access

Optoelectronic and Energy Level Exploration of Bismuth and Antimony-Based Materials for Lead-Free Solar Cells

Ryosuke Nishikubo, Hiroyuki Kanda, Inés García-Benito, Agustín Molina-Ontoria, Gianluca Pozzi, Abdullah M. Asiri, Mohammad Khaja Nazeeruddin, Akinori Saeki

Chemistry of Materials· Volume 32· Issue 15

Abstract

Bismuth- and antimony-based materials, such as A3M2X9 and AMSX2 (A = cation, M = Bi, Sb, S = sulfur, X = halogen), are promising candidates as the counterpart to lead halide perovskite. However, the large number of different compositions and crystal structures (dimer, perovskite, etc.) has made these materials largely overlooked; thus, an intuitive evaluation strategy is required. Here, we present a comprehensive study of the energy levels (bandgap, valence band maximum, etc.) and optoelectronics (photoconductivity and charge transfer to charge transport material) of the Bi- and Sb-based materials, which include 6 crystal categories with 44 compositions, by using time-resolved microwave conductivity (TRMC). Importantly, we found an efficient hole transfer from the Sb-based materials to the hole transport materials with the inclusion of the thiophene component, leading to an improved power conversion efficiency of 2.91% for Sb2S3-containing SbSI, prepared by a novel one-step method. Our study establishes a key rule for exploring active layer compositions and designing device structures, which would accelerate the evolution of Bi- and Sb-based lead-free solar cells.
Source: openalex_inverted_index · Quality: baseline

Research context

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

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

Affiliations

Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan

Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne Valais Wallis, Rue de l’Industrie 17, 1950 Sion, Switzerland

Departamento de Química Organica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain

IMDEA-Nanociencia, C/Faraday, 9 Ciudad Universitaria de Cantoblanco, 28049 Madrid, Spain

Institute of Chemical Sciences and Technologies-National Research Council (SCITEC-CNR), 20133 Milano, Italy

Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P.O. Box 80203, 21589 Jeddah, Saudi Arabia

Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan

Funding

Schweizerischer Nationalfonds zur F?rderung der Wissenschaftlichen Forschung · Precursory Research for Embryonic Science and Technology · Japan Society for the Promotion of Science

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