Shin, Eul-Yong Lee, Yeongseop Kim, Ho Young Park, So Hyun Jun, Yongseok Kim, Jin Young Son, Hae Jung 2024-09-14T07:00:17Z 2024-09-14T07:00:17Z 2024-09-13 2024-09 https://pubs.kist.re.kr/handle/201004/150594 Mitigating ultraviolet exposure-induced photodegradation remains a critical challenge to the long-term stability of organic photovoltaics (OPVs). Here, we improved the stability of the OPV device by introducing an antioxidant interlayer composed of nanocrystalline ceria supported on mesoporous silica nanoparticles (CeO x -MSN). The CeO x nanocrystals within the CeO x -MSN exhibited a high density of oxygen vacancies and a large ratio of Ce(III) chemical states known to scavenge reactive oxygen species. Optimizing the particle size of the CeO x nanocrystals further enhanced the ratio of Ce(III) states, enabling superior radical scavenging efficacy in methyl violet degradation tests compared with commercial CeO x nanostructures. The OPV performance test confirmed that the optimized CeO x -MSN (CeO x -MSN_S) can scavenge radicals without a degradation in initial performance under one-sun illumination. More importantly, the photostability test revealed that the OPV device with CeO x -MSN_S retained 73% of initial performance while the conventional device retained only 54%, corroborating the excellent radical scavenging efficacy of CeO x -MSN_S. English AMER CHEMICAL SOC CeOx-Mesoporous Silica Nanoparticle Antioxidants to Enhance the Stability of Organic Photovoltaic Devices Article 10.1021/acsaelm.4c00867 1 ACS Applied Electronic Materials, v.6, no.9, pp.6391 - 6400 ACS Applied Electronic Materials 6 9 6391 6400 N scie scopus 001302848900001 2-s2.0-85202726525 Engineering, Electrical & Electronic Materials Science, Multidisciplinary Engineering Materials Science Article; Early Access FUEL-CELL DURABILITY SOLAR-CELLS DEGRADATION ZNO IMPACT CERIA reactive oxygen species ceria mesoporoussilica antioxidants organic photovoltaics