journal article·2023-05-01

Thiophene-Based Polyelectrolyte Boosts High-Performance Quasi-2D Perovskite Solar Cells with Ultralow Energy Loss

Hsin-Hsiang Huang, Tso-An Yang, Li-Yun Su, Chiung-Han Chen, Yu-Ting Chen, Dibyajyoti Ghosh, King-Fu Lin, Sergei Tretiak, Chu-Chen Chueh, Wanyi Nie, Hsinhan Tsai, Leeyih Wang

ACS Materials Letters· Volume 5· Issue 5
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Abstract

The rise of quasi-2D perovskite structures holds great promise for highly efficient and stable perovskite solar cells (PCSs). As such, fabricating large-area quasi-2D perovskite solar cells (PCSs) with high power conversion remains under active exploration. We identified that maintaining the homogeneous crystalline orientation upon scaling up is a key challenge. Thus, we introduce a thiophene-based polyelectrolyte as the hole transporting layer (HTL) to facilitate large area quasi-2D PCSs fabrication with high performance. The HTL with carboxyl acid anchoring groups can be attached to various conducting metal oxide substrates, enabling a conformal self-assembled monolayer (SAM). This SAM surface facilitates the quasi-2D perovskite crystal growth vertically aligned to the substrate. Along with a favorable energy alignment, a high open-circuit voltage ( V OC ) of 1.24 V was achieved, approaching the Shockley-Queisser optimal limit ( V OC = 1.34 V). Remarkably, the device maintained over 80% of its initial efficiency after operating at the maximum power point under simulated AM1.5G solar irradiation for 1000 h at a relative humidity of 60%. These findings offer new fabrication strategies, paving the way to scalable quasi-2D PCS production with high efficiencies.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic Light-Emitting Diodes Research

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

Affiliations

Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan

Department of Materials Science and Engineering, National Taiwan University, Taipei 10617, Taiwan

Department of Chemical and Materials Engineering, Southern Taiwan University Science and Technology, Tainan 71005, Taiwan

Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan

Advanced Research Center for Green Materials Science and Technology, National Taiwan University, Taipei 10617, Taiwan

Center for Integrated Nanotechnologies, Materials Physics and Application Division, Los Alamos National Laboratory. Los Alamos, New Mexico 87545, United States

Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States

Center of Atomic Initiative for New Materials, National Taiwan University, Taipei, 10617, Taiwan

Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan

Funding

Los Alamos National Laboratory · Academia Sinica · National Taiwan University · Ministry of Science and Technology, Taiwan · National Science and Technology Council

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