DataVXAdvanced MaterialsPaper
journal article·2022-11

Single‐Crystal Perovskite Solar Cells Exhibit Close to Half A Millimeter Electron‐Diffusion Length

Bekir Turedi, Muhammad N. Lintangpradipto, Oskar J. Sandberg, Aren Yazmaciyan, Gebhard J. Matt, Abdullah Y. Alsalloum, Khulud Almasabi, Kostiantyn Sakhatskyi, Sergii Yakunin, Xiaopeng Zheng, Rounak Naphade, Saidkhodzha Nematulloev, Vishal Yeddu, Derya Baran, Ardalan Armin, Makhsud I. Saidaminov, Maksym V. Kovalenko, Omar F. Mohammed, Osman M. Bakr

Advanced Materials· Volume 34· Issue 47
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Source abstract

Abstract

Abstract Single‐crystal halide perovskites exhibit photogenerated‐carriers of high mobility and long lifetime, making them excellent candidates for applications demanding thick semiconductors, such as ionizing radiation detectors, nuclear batteries, and concentrated photovoltaics. However, charge collection depreciates with increasing thickness; therefore, tens to hundreds of volts of external bias is required to extract charges from a thick perovskite layer, leading to a considerable amount of dark current and fast degradation of perovskite absorbers. However, extending the carrier‐diffusion length can mitigate many of the anticipated issues preventing the practical utilization of perovskites in the abovementioned applications. Here, single‐crystal perovskite solar cells that are up to 400 times thicker than state‐of‐the‐art perovskite polycrystalline films are fabricated, yet retain high charge‐collection efficiency in the absence of an external bias. Cells with thicknesses of 110, 214, and 290 µm display power conversion efficiencies (PCEs) of 20.0, 18.4, and 14.7%, respectively. The remarkable persistence of high PCEs, despite the increase in thickness, is a result of a long electron‐diffusion length in those cells, which was estimated, from the thickness‐dependent short‐circuit current, to be ≈0.45 mm under 1 sun illumination. These results pave the way for adapting perovskite devices to optoelectronic applications in which a thick active layer is essential.
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Research context

Energy storageElectronic materials

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

KAUST Catalysis Center (KCC) Division of Physical Sciences and Engineering King Abdullah University of Science and Technology (KAUST) Thuwal 23955–6900 Kingdom of Saudi Arabia

Laboratory of Inorganic Chemistry Department of Chemistry and Applied Biosciences ETH Zürich Zürich CH‐8093 Switzerland

Laboratory for Thin Films and Photovoltaics Empa – Swiss Federal Laboratories for Materials Science and Technology Dübendorf CH‐8600 Switzerland

Sustainable Advanced Materials (Sêr SAM) Department of Physics Swansea University Singleton Park Swansea SA2 8PP UK

KAUST Solar Center (KSC) Division of Physical Sciences and Engineering King Abdullah University of Science and Technology (KAUST) Thuwal 23955–6900 Kingdom of Saudi Arabia

Department of Chemistry and Department of Electrical & Computer Engineering Centre for Advanced Materials and Related Technologies (CAMTEC) University of Victoria Victoria BC V8P 5C2 Canada

Advanced Membranes and Porous Materials Center (AMPM) Division of Physical Sciences and Engineering King Abdullah University of Science and Technology (KAUST) Thuwal 23955–6900 Kingdom of Saudi Arabia

Funding

King Abdullah University of Science and Technology · Natural Sciences and Engineering Research Council of Canada

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