# Fileset

[IPEROPE-2025-NIMS.pdf](https://mdr.nims.go.jp/filesets/403b1758-bd40-4de2-bc41-26b8fde1a607/download)

## Creator

[KHADKA Dhruba Bahadur](https://orcid.org/0000-0001-9134-3890), [YANAGIDA Masatoshi](https://orcid.org/0000-0002-8065-7875), [SHIRAI Yasuhiro](https://orcid.org/0000-0003-2164-5468)

## Rights

[In Copyright](http://rightsstatements.org/vocab/InC/1.0/)

## Other metadata

[Exploration of Degradation in Perovskite Solar Cells via Thermal Hysteresis of Photocurrent and Capacitance](https://mdr.nims.go.jp/datasets/2e35e55e-a5e6-4677-8955-7e34fc8964f5)

## Fulltext

PowerPoint プレゼンテーションExploration of Degradation in Perovskite Solar Cells via Thermal Hysteresis of Photocurrent and CapacitanceThe authors acknowledge the support of the Hitachi Foundation, Kurata grant.E-mail： * KHADKA.B.Dhruba@nims.go.jpPhotovoltaics Materials Group, Global Research Center for Environment and Energy based on Nanomaterials Science (GREEN), National Institute for Materials Science (NIMS), Tsukuba, Japan. Dhruba B. Khadka*, M. Yanagida and Y. ShiraiSummaryExperimentalIntroductionDevice Results and Analysis• Exploration of the degradation mechanisms of perovskite solar cells is paramount to addressing stability-related issues.• Our study delves into the deterioration of PSC by probing thermal hysteresis of photocurrent (THPC) and thermally active ionic dynamics. • Capacitance analysis reveals changes driven by the accumulation of interfacial ionic charges and active defects under photo-thermal drifting.• This work underscores the direct correlation between the degradation of PSC devices and the presence of thermally activated charges. ➢ THPC emissions with a complex thermally active charge or ion accumulations due to interfacial deterioration.➢ These photoactive mobile charges are more pronounced in aged PSC with higher charge densities.➢ Capacitance analysis demonstrates that the thermally triggered charge accumulation is more pronounced in aged PSC.➢ THPC plays a detrimental role in losing photo-current in the degraded PSCs.Ref :1. D. B. Khadka et al. Sol. Energy Mater. Sol. Cells, 2025, 281,1133192. D. B. Khadka et al. Sol. Energy Mater. Sol. Cells, 2022, 246,1118993. D. B. Khadka et al. ACS Appl. Energy Mater. 2021, 4, 10, 11121.4. D. B. Khadka et al. J. Mater. Chem. C, 2018, 6, 162-170Device structure ➢ THPC spectra of the fresh-PSCs under temperature drifting rate (2 K/min)➢ Fitting by multiple peak analysis methodsJ-V curves of fresh and aged PSCs0.0 0.2 0.4 0.6 0.8 1.005101520J (mAcm-2)V (V)/  Fresh device/  Aged deviceSchematic of the THPCspectra measurementDevice/ParameterFresh AgedJsc(mAcm-2) 21.4412.59Voc(V) 0.998 1.06FF 0.746 0.460η(%) 16.35 6.01➢ Capacitance and Device Degradation➢ Fresh PSC➢ Aged PSC➢ Schematic of the THPC measurement and corresponding spectraFresh AgedQTHPC (mC) QTHPC (%) QTHPC (mC) QTHPC %)LTR (240-283 K) 0.429 10.24 1.927 33.95WTR (283-323 K) 2.452 58.52 2.105 37.08HTR (323- 363 K) 1.309 31.24 1.644 28.974.191 100 5.677 100➢ Aged PSC➢ Fresh PSC Slide 1