DataVXAdvanced Functional MaterialsPaper
journal article·2024-10Open access

Li‐Doping and Ag‐Alloying Interplay Shows the Pathway for Kesterite Solar Cells with Efficiency Over 14%

Yuancai Gong, Alex Jimenez‐Arguijo, Axel Gon Medaille, Simon Moser, Arindam Basak, Romain Scaffidi, Romain Carron, Denis Flandre, Bart Vermang, Sergio Giraldo, Hao Xin, Alejandro Perez‐Rodriguez, Edgardo Saucedo

Advanced Functional Materials· Volume 34· Issue 42
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Source abstract

Abstract

Abstract Kesterite photovoltaic technologies are critical for the deployment of light‐harvesting devices in buildings and products, enabling energy sustainable buildings, and households. The recent improvements in kesterite power conversion efficiencies have focused on improving solution‐based precursors by improving the material phase purity, grain quality, and grain boundaries with many extrinsic doping and alloying agents (Ag, Cd, Ge…). The reported progress for solution‐based precursors has been achieved due to a grain growth in more electronically intrinsic conditions. However, the kesterite device performance is dependent on the majority carrier density and sub‐optimal carrier concentrations of 10 14 –10 15 cm −3 have been consistently reported. Increasing the majority carrier density by one order of magnitude would increase the efficiency ceiling of kesterite solar cells, making the 20% target much more realistic. In this work, LiClO 4 is introduced as a highly soluble and highly thermally stable Li precursor salt which leads to optimal (>10 16 cm −3 ) carrier concentration without a significant impact in other relevant optoelectronic properties. The findings presented in this work demonstrate that the interplay between Li‐doping and Ag‐alloying enables a reproducible and statistically significant improvement in the device performance leading to efficiencies up to 14.1%.
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Research context

Metals & alloysElectronic materials

OpenAlex topics: Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties · Semiconductor materials and interfaces

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

Affiliations

Electronic Engineering Department Universitat Politècnica de Catalunya (UPC) Photovoltaic Lab−Micro and Nano Technologies Group (MNT) EEBE Av Eduard Maristany 10–14 Barcelona 08019 Spain

Barcelona Center for Multiscale Science & Engineering Universitat Politècnica de Catalunya (UPC) Av Eduard Maristany 10–14 Barcelona Catalonia 08019 Spain

Solar Energy Materials and Systems Group Catalonia Institute for Energy Research (IREC) Jardins de les Dones de Negre 1 Sant Adrià de Besòs Barcelona 08930 Spain

Laboratory for Thin Films and Photovoltaics Empa─Swiss Federal Laboratories for Materials Science and Technology Überlandstrasse 129 Dübendorf 8600 Switzerland

Thin Film Photovoltaic Lab School of Electronics Engineering KIIT‐ Deemed to be University Bhubaneswar Odisha 751024 India

IMO Hasselt University Wetenschapspark 1 Diepenbeek 3590 Belgium

IMOMEC IMEC Wetenschapspark 1 Diepenbeek 3590 Belgium

EnergyVille 2 Thor Park 8320 Genk 3600 Belgium

ICTEAM Université Catholique de Louvain Place du Levant L5.03.02 Louvain‐la‐Neuve 1348 Belgium

State Key Laboratory for Organic Electronics and Information Displays College of Chemistry and Life Sciences Nanjing University of Posts & Telecommunications Nanjing 210023 China

IN2UB Departament d'Enginyeria Electrònica i Biomèdica Universitat de Barcelona Carrer de Martí i Franquès 1 Barcelona 08028 Spain

Funding

National Key Research and Development Program of China

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