Filterless narrowband photodetectors enabled by controllable band modulation through ion migration: The case of halide perovskites

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dc.contributor.authorLi, Yu
dc.contributor.authorYu, Shanshan
dc.contributor.authorYang, Junjie
dc.contributor.authorZhang, Kai
dc.contributor.authorHu, Mingyu
dc.contributor.authorQiu, Weitao
dc.contributor.authorGuo, Fumin
dc.contributor.authorQian, Wei
dc.contributor.authorReinecke, Sean
dc.contributor.authorChen, Tao
dc.contributor.authorSaidaminov, Makhsud I.
dc.contributor.authorWang, Jian
dc.contributor.authorYang, Shihe
dc.date.accessioned2025-01-23T18:38:35Z
dc.date.available2025-01-23T18:38:35Z
dc.date.issued2023
dc.description.abstractNarrowband photodetectors conventionally rely on optical structure design or bandpass filters to achieve the narrowband regime. Recently, a strategy for filterless narrowband photoresponse based on the charge collection narrowing (CCN) mechanism was reported. However, the CCN strategy requires an electrically and optically “thick” photoactive layer, which poses challenges in controlling the narrowband photoresponse. Here we propose a novel strategy for constructing narrowband photodetectors by leveraging the inherent ion migration in perovskites, which we term “band modulation narrowing” (BMN). By manipulating the ion migration with external stimuli such as illumination, temperature, and bias voltage, we can regulate in situ the energy-band structure of perovskite photodetectors (PPDs) and hence their spectral response. Combining the Fermi energy levels obtained by the Kelvin probe force microscopy, the internal potential profiles from solar cell capacitance simulator simulation, and the anion accumulation revealed by the transient ion-drift technique, we discover two critical mechanisms behind our BMN strategy: the extension of an optically active but electronically dead region proximal to the top electrode and the down-bending energy bands near the electron transport layer. Our findings offer a case for harnessing the often-annoying ion migration for developing advanced narrowband PPDs.
dc.description.reviewstatusReviewed
dc.description.scholarlevelFaculty
dc.description.sponsorshipThe authors gratefully acknowledge the support of the National Natural Science Foundation of China (52202182, 22261160370, U2001217, 22275180, and 21972006), Shenzhen Peacock plan (KQTD2016053015544057), and Shenzhen Innovation Fund (JCYJ20220818101018038). Sean Reinecke and Makhsud I. Saidaminov are grateful to the Natural Sciences and Engineering Research Council of Canada (RGPIN-2020-04239) for financial support. The authors are deeply grateful to Dr. Marc Burgelman at the University of Gent, Belgium, for providing the SCAPS-1D software freely available for academic use. The authors also acknowledge Jintao Fu and Xingzhan Wei for the help of noise spectrum measurement.
dc.identifier.citationLi, Y., Yu, S., Yang, J., Zhang, K., Hu, M., Qiu, W., Guo, F., Qian, W., Reinecke, S., Chen, T., Saidaminov, M. I., Wang, J., & Yang, S. (2023). Filterless narrowband photodetectors enabled by controllable band modulation through ion migration: The case of halide perovskites. InfoMat, 6(1). https://doi.org/10.1002/inf2.12506
dc.identifier.urihttps://doi.org/10.1002/inf2.12506
dc.identifier.urihttps://hdl.handle.net/1828/20983
dc.language.isoen
dc.publisherInfoMat
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.departmentDepartment of Chemistry
dc.titleFilterless narrowband photodetectors enabled by controllable band modulation through ion migration: The case of halide perovskites
dc.typeArticle

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