Efficient and Stable Perovskite Solar Cells with a High Open‐Circuit Voltage Over 1.2 V Achieved by a Dual‐Side Passivation Layer
Source abstract
Abstract
Abstract Suppressing nonradiative recombination at the interface between the organometal halide perovskite (PVK) and the charge‐transport layer (CTL) is crucial for improving the efficiency and stability of PVK‐based solar cells (PSCs). Here, a new bathocuproine (BCP)‐based nonconjugated polyelectrolyte (poly‐BCP) is synthesized and this is introduced as a “dual‐side passivation layer” between the tin oxide (SnO2) CTL and the PVK absorber. Poly‐BCP significantly suppresses both bulk and interfacial nonradiative recombination by passivating oxygen‐vacancy defects from the SnO2 side and simultaneously scavenges ionic defects from the other (PVK) side. Therefore, PSCs with poly‐BCP exhibits a high power conversion efficiency (PCE) of 24.4% and a high open‐circuit voltage of 1.21 V with a reduced voltage loss (PVK bandgap of 1.56 eV). The non‐encapsulated PSCs also show excellent long‐term stability by retaining 93% of the initial PCE after 700 h under continuous 1‐sun irradiation in nitrogen atmosphere conditions.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic Electronics and Photovoltaics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering Gwangju Institute of Science and Technology (GIST) Gwangju 61005 Republic of Korea
Heeger Center for Advanced Materials (HCAM) and Research Institute for Solar and Sustainable Energies (RISE) Gwangju Institute of Science and Technology (GIST) Gwangju 61005 Republic of Korea
Sustainable Advanced Materials (Sêr‐SAM) Department of Physics Swansea University Singleton Park Swansea SA2 8PP UK
Department of Chemistry and Chemistry Institute for Functional Materials Pusan National University (PNU) Busan 46241 Republic of Korea
Advanced Photonics Research Institute Gwangju Institute of Science and Technology (GIST) Gwangju 61005 Republic of Korea
Pohang Accelerator Laboratory Pohang University of Science and Technology Pohang 37673 Republic of Korea
Department of Energy and Materials Engineering Dongguk University Seoul 04620 Republic of Korea
Graduate School of Energy Convergence Institute of Integrated Technology Gwangju Institute of Science and Technology (GIST) Gwangju 61005 Republic of Korea
Funding
National Research Foundation
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