Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
Publication date: 18th December 2023
The commercial viability of metal halide perovskite (MHP) solar cells hinges significantly on their electrical stability [1], particularly considering their operation under non-ideal voltages in field-installed settings. Instances of instantaneous extremely high voltage (IEHVs), stemming from electrostatic discharge during roll-to-roll processes in flexible device manufacturing [2], give rise to a notable challenge because IEHVs affects device stability. Furthermore, the susceptibility of field-installed solar cells to lightning strikes and surge current in electric grid system also exacerbates this concern. Consequently, comprehensive investigations into the impact of IEHVs on MHP solar cells is conducted, prompting the suggestion of a device architecture with electrical stability against IEHVs.
The adverse effects of IEHVs on perovskite solar cells manifest primarily in destruction of their diode characteristics. This phenomenon is attributed to physical and chemical damage inflicted on the interface between the perovskite and carrier transport layer, leading to increased recombination losses and series resistance. To fortify this vulnerable heterointerface, a widely recognized surface defect passivation technique involving the addition of excessive PbI2 to perovskite films has been employed. This excess PbI2, majorly locates at the interface, effectively shields PSCs from IEHVs.
Furthermore, enhancements in device stability against high voltage have been achieved through the incorporation of established defect passivation layers such as C60 and phenethyl ammonium iodide into the perovskite film interface. Consequently, interface defect passivation emerges as a promising strategy for bolstering the resilience of PSCs against abnormal electrical stresses from IEHVs. This research is anticipated to furnish foundational insights essential for the development of electrically dependable PSCs, thereby facilitating their integration as grid-connected, field-installed energy generation sources.
The presentation and participance of the conference were supported by VAHALLA project and Istituto Italiaono di Tecnologia. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) through the Mid-career researcher program (NRF- 2022R1A2C1092582) and the Global Frontier R&D Program (2012M3A6A7054855) of the Global Frontier Center for Multiscale Energy Systems. This Presentations of conference was supported by Istituto Italiano di Tecnologia.
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