Fast Response, High Spectral Rejection Ratio, Self-Filtered Ultranarrowband Photodetectors Based on Perovskite Single-Crystal Heterojunctions.
Fast Response, High Spectral Rejection Ratio, Self-Filtered Ultranarrowband Photodetectors Based on Perovskite Single-Crystal Heterojunctions.
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DOI：
10.1021/acsami.3c10559
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发表时间：
2023-11
影响因子：
9.5
通讯作者：
Lu Xue;Xin Wang;Yuzhu Pan;Manman Luo;Yubing Xu;Yuwei Li;Jingda Zhao;Zhiwei Zhao;Qing Li;B. Bae;O. E. Fayemi;Jianming Zhou;Ying Zhu;Wei Lei;Xiaobing Zhang
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作者：
Lu Xue;Xin Wang;Yuzhu Pan;Manman Luo;Yubing Xu;Yuwei Li;Jingda Zhao;Zhiwei Zhao;Qing Li;B. Bae;O. E. Fayemi;Jianming Zhou;Ying Zhu;Wei Lei;Xiaobing Zhang
窄带光电探测器具有高精度的光谱分辨率，在高分辨率成像和加密通信中具有广泛的应用潜力。在这项工作中，我们报道了一种快速响应、高光谱抑制比和自滤波超宽带光电探测器的新机制，它通过掺杂Bi3+来引入体复合，并配合表面复合来进一步猝灭钙钛矿型单晶中短波长光激发产生的光生电荷。采用晶格匹配的溶液外延生长方法在单晶上制备了以收集电荷为中心的钙钛矿型薄膜。由于PN异质结的形成，这种机制的窄带光电探测器具有显著的光谱选择性和探测性能，其超箭半峰全宽为7.7 nm，光谱抑制比为790，比探测率高达1.5×1010Jones，响应速度快，上升时间和下降时间分别为∼8和137μS。自滤波窄带光电探测器的超快和超箭光谱响应为高精度和高分辨率光电检测提供了一种新的策略。
Narrowband photodetectors have wide application potential in high-resolution imaging and encrypted communication, due to their high-precision spectral resolution capability. In this work, we report a fast response, high spectral rejection ratio, and self-filtered ultranarrowband photodetector with a new mechanism, which introduces bulk recombination by doping Bi3+ and cooperates with surface recombination for further quenching photogenerated charges generated by short-wavelength-light excitation in perovskite single-crystal. A perovskite film focused on collecting charges is fabricated on the single crystal by a lattice-matched solution-processed epitaxial growth method. Due to the formation of PN heterojunctions, a narrowband photodetector in this mechanism has remarkable spectral selectivity and detection performance with an ultranarrow full width at half-maximum (FWHM) of 7.7 nm and a high spectral rejection ratio of 790, as well as a high specific detectivity up to 1.5 × 1010 Jones, a fast response speed with a rise time and fall time of ∼8 and 137 μs. The ultrafast and ultranarrow spectra response of self-filtered narrowband photodetector provides a new strategy in high-precision and high-resolution photoelectric detection.