Soopy Abdul Kareem Kalathil, Liu Shengzhong Frank, Najar Adel
Department of Physics, College of Science, United Arab Emirates University, Al Ain 15551, United Arab Emirates.
Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Dalian 116023, China.
Nanomaterials (Basel). 2024 Jun 21;14(13):1068. doi: 10.3390/nano14131068.
Perovskite single crystals have garnered significant interest in photodetector applications due to their exceptional optoelectronic properties. The outstanding crystalline quality of these materials further enhances their potential for efficient charge transport, making them promising candidates for next-generation photodetector devices. This article reports the synthesis of methyl ammonium lead bromide (MAPbBr) perovskite single crystal (SC) via the inverse-temperature crystallization method. To further improve the performance of the photodetector, Zn-porphyrin (Zn-PP) was used as a passivating agent during the growth of SC. The optical characterization confirmed the enhancement of optical properties with Zn-PP passivation. On single-crystal surfaces, integrated photodetectors are fabricated, and their photodetection performances are evaluated. The results show that the single-crystalline photodetector passivated with 0.05% Zn-PP enhanced photodetection properties and rapid response speed. The photoelectric performance of the device, including its responsivity (R), external quantum efficiency (EQE), detective nature (D), and noise-equivalent power (NEP), showed an enhancement of the un-passivated devices. This development introduces a new potential to employ high-quality perovskite single-crystal-based devices for more advanced optoelectronics.
钙钛矿单晶因其优异的光电特性而在光电探测器应用中引起了广泛关注。这些材料出色的晶体质量进一步提升了其有效电荷传输的潜力，使其成为下一代光电探测器器件的有力候选者。本文报道了通过逆温结晶法合成甲基溴化铅（MAPbBr）钙钛矿单晶（SC）。为了进一步提高光电探测器的性能，在单晶生长过程中使用锌卟啉（Zn-PP）作为钝化剂。光学表征证实了Zn-PP钝化增强了光学性能。在单晶表面制备了集成光电探测器，并对其光电探测性能进行了评估。结果表明，用0.05% Zn-PP钝化的单晶光电探测器增强了光电探测性能和快速响应速度。该器件的光电性能，包括其响应度（R）、外量子效率（EQE）、探测率（D）和噪声等效功率（NEP），均显示出优于未钝化器件。这一进展为采用高质量钙钛矿单晶基器件用于更先进的光电子学引入了新的潜力。
