# Fileset

[IEEE-PVSC-2025-THPCーKHADKA.pdf](https://mdr.nims.go.jp/filesets/9ea4a80e-9391-4e4a-922c-6b3ac3c100a5/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

[Investigation of Degradation in Perovskite Solar Cells Using Thermal Hysteresis of Photocurrent ](https://mdr.nims.go.jp/datasets/ccd94341-9788-4fff-ac9f-9007e2987e66)

## Fulltext

PowerPoint プレゼンテーションInvestigation of Degradation in Perovskite Solar Cells Using Thermal Hysteresis of PhotocurrentThe 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➢ Investigating the degradation mechanisms of perovskite solar cells (PSCs) is essential for addressing long-term stability challenges.➢ This study explores PSC deterioration through the lens of thermal hysteresis in photocurrent (THPC) and thermally activated ionic migration.➢ Capacitance analysis highlights the accumulation of interfacial ionic charges and the activation of defects during photo-thermal stress.➢ The results reveal a direct link between PSC degradation and thermally induced charge dynamics, emphasizing their role in limiting device stability.➢ 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 The operational stability of the devices atdifferent temperatures under 1 sun➢ 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