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Kim JH, Kim YR, Kim J, Oh CM, Hwang IW, Kim J, Zeiske S, Ki T, Kwon S, Kim H, Armin A, Suh H, Lee K. Efficient and Stable Perovskite Solar Cells with a High Open-Circuit Voltage Over 1.2 V Achieved by a Dual-Side Passivation Layer. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2205268. [PMID: 36030364 DOI: 10.1002/adma.202205268] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 08/05/2022] [Indexed: 06/15/2023]
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.
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Affiliation(s)
- Ju-Hyeon Kim
- 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
| | - Yong Ryun Kim
- Sustainable Advanced Materials (Sêr-SAM), Department of Physics, Swansea University, Singleton Park, Swansea, SA2 8PP, UK
| | - Juae Kim
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University (PNU), Busan, 46241, Republic of Korea
| | - Chang-Mok Oh
- Advanced Photonics Research Institute, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea
| | - In-Wook Hwang
- Advanced Photonics Research Institute, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Jehan Kim
- Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 37673, Republic of Korea
| | - Stefan Zeiske
- Sustainable Advanced Materials (Sêr-SAM), Department of Physics, Swansea University, Singleton Park, Swansea, SA2 8PP, UK
| | - Taeyoon Ki
- 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
| | - Sooncheol Kwon
- Department of Energy and Materials Engineering, Dongguk University, Seoul, 04620, Republic of Korea
| | - Heejoo Kim
- 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
- Graduate School of Energy Convergence, Institute of Integrated Technology, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, Republic of Korea
| | - Ardalan Armin
- Sustainable Advanced Materials (Sêr-SAM), Department of Physics, Swansea University, Singleton Park, Swansea, SA2 8PP, UK
| | - Hongsuk Suh
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University (PNU), Busan, 46241, Republic of Korea
| | - Kwanghee Lee
- 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
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