Elucidating Degradation Pathways in Perovskite-Based Water Splitting Devices
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| Title: | Elucidating Degradation Pathways in Perovskite-Based Water Splitting Devices |
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| Authors: | Wooyong Jeong, Chang-Seop Jeong, Juwon Yun, Young Sun Park, Junwoo Lee, Jeongyoub Lee, Chan Uk Lee, Subin Moon, Soobin Lee, Sumin Kim, Jun Hwan Kim, Sang Yeop Park, Donghyun Kim, Seonyoo Kim, Jaeeon Lim, Jeongjun Lee, Hyein An, Jooho Moon |
| Publication Year: | 2025 |
| Subject Terms: | Biophysics, Medicine, Cancer, Space Science, Environmental Sciences not elsewhere classified, Biological Sciences not elsewhere classified, hole transport layer, electron transport layer, electrochemically active region, based electrochemical systems, elucidating degradation pathways, induced failure process, induced degradation within, exacerbates charge accumulation, ex situ <, distinct degradation pathway, induced degradation, situ <, suppress moisture, support high, studies track, slower consumption, results clarify, providing insights, performance operation, observations show, instability originates, illuminated area, extended operation, electrolyte interface |
| Description: | Despite recent encapsulation strategies that suppress moisture-induced degradation and support high-performance operation, perovskite-based water splitting devices still exhibit limited operational stability. This instability originates from the slower consumption of photocarriers, compared with photovoltaic (PV) cells, which exacerbates charge accumulation at the catalyst/electrolyte interface. Herein, in situ and ex situ studies track how this intense charge buildup governs a distinct degradation pathway in water splitting anodes relative to encapsulated perovskite PV cells. Our observations show that the anodes undergo a charge-induced failure process: accelerated iodine migration triggers defect formation at the hole transport layer/perovskite interface located directly beneath the electrochemically active region. In contrast, encapsulated PV cells experience light-induced degradation within the illuminated area, where defects emerge only after extended operation and at the electron transport layer/perovskite interface. These results clarify that perovskite-based water splitting devices follow a distinct, electrochemically driven degradation mechanism, providing insights for designing more stable perovskite-based electrochemical systems. |
| Document Type: | article in journal/newspaper |
| Language: | unknown |
| DOI: | 10.1021/acsenergylett.5c02009.s001 |
| Availability: | https://doi.org/10.1021/acsenergylett.5c02009.s001 https://figshare.com/articles/journal_contribution/Elucidating_Degradation_Pathways_in_Perovskite-Based_Water_Splitting_Devices/30062885 |
| Rights: | CC BY-NC 4.0 |
| Accession Number: | edsbas.9C9F41C5 |
| Database: | BASE |
Nájsť tento článok vo Web of Science | Abstract: | Despite recent encapsulation strategies that suppress moisture-induced degradation and support high-performance operation, perovskite-based water splitting devices still exhibit limited operational stability. This instability originates from the slower consumption of photocarriers, compared with photovoltaic (PV) cells, which exacerbates charge accumulation at the catalyst/electrolyte interface. Herein, in situ and ex situ studies track how this intense charge buildup governs a distinct degradation pathway in water splitting anodes relative to encapsulated perovskite PV cells. Our observations show that the anodes undergo a charge-induced failure process: accelerated iodine migration triggers defect formation at the hole transport layer/perovskite interface located directly beneath the electrochemically active region. In contrast, encapsulated PV cells experience light-induced degradation within the illuminated area, where defects emerge only after extended operation and at the electron transport layer/perovskite interface. These results clarify that perovskite-based water splitting devices follow a distinct, electrochemically driven degradation mechanism, providing insights for designing more stable perovskite-based electrochemical systems. |
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| DOI: | 10.1021/acsenergylett.5c02009.s001 |