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https://hdl.handle.net/1822/87436
Título: | Disentangling the role of the SnO layer on the pyro-phototronic effect in ZnO-based self-powered photodetectors |
Autor(es): | Vieira, E. M. F Silva, José Pedro Basto Gwozdz, Katarzyna Kaim, Adrian Gomes, Nuno M. Chahboun, Adil Gomes, M. J. M. Correia, José H. |
Palavras-chave: | n-p-n heterojunction pyro-phototronic effect self-powered photodetectors ultrafast photosensors |
Data: | 2023 |
Editora: | Wiley |
Revista: | Small |
Citação: | Vieira, E. M. F., Silva, J. P. B., Gwozdz, K., Kaim, A., Gomes, N. M., Chahboun, A., … Correia, J. H. (2023, April 22). Disentangling the Role of the SnO Layer on the Pyro‐Phototronic Effect in ZnO‐Based Self‐Powered Photodetectors. Small. Wiley. http://doi.org/10.1002/smll.202300607 |
Resumo(s): | Self-powered photodetectors (PDs) have been recognized as one of the developing trends of next-generation optoelectronic devices. Herein, it is shown that by introducing a thin layer of SnO film between the Si substrate and the ZnO film, the self-powered photodetector Al/Si/SnO/ZnO/ITO exhibits a stable and uniform violet sensing ability with high photoresponsivity and fast response. The SnO layer introduces a built-in electrostatic field to highly enhance the photocurrent by over 1000%. By analyzing energy diagrams of the p-n junction, the underlying physical mechanism of the self-powered violet PDs is carefully illustrated. A high photo-responsivity (R) of 93 mA W-1 accompanied by a detectivity (D*) of 3.1 x 10(10) Jones are observed under self-driven conditions, when the device is exposed to 405 nm excitation laser wavelength, with a laser power density of 36 mW cm(-2) and at a chopper frequency of 400 Hz. The Si/SnO/ZnO/ITO device shows an enhancement of 3067% in responsivity when compared to the Al/Si/ZnO/ITO. The photodetector holds an ultra-fast response of approximate to 2 mu s, which is among the best self-powered photodetectors reported in the literature based on ZnO. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/87436 |
DOI: | 10.1002/smll.202300607 |
ISSN: | 1613-6810 |
Versão da editora: | https://onlinelibrary.wiley.com/doi/10.1002/smll.202300607 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDF - FMNC - Artigos/Papers (with refereeing) CMEMS - Artigos em revistas internacionais/Papers in international journals |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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71-Small 19 (2023) 2300607.pdf | 3,97 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons