Cu掺杂NiO空穴层修饰高性能全无机无铅钙钛矿紫外探测器
High-Performance Inorganic Lead-Free Perovskite Ultraviolet Detector with Cu-Doped NiO Hole Transport Layer Modification
DOI: 10.12677/ms.2026.164083, PDF,    科研立项经费支持
作者: 方墁祺, 胡 辉, 胡际达, 高 云*：湖北大学材料科学与工程学院，湖北 武汉
关键词: NiO；Cu掺杂；Cs2AgBiBr6；Cs2AgInCl6；光电探测器；NiO； Cu Doping； Cs2AgBiBr6； Cs2AgInCl6； Photodetector
摘要: 全无机无铅钙钛矿光电探测器因其优异的物理化学特性而备受关注，其中载流子传输层对器件光电探测性能具有决定性影响。本工作采用旋涂法在ITO衬底上常温制备了不同Cu掺杂浓度(0, 3, 4, 5 at %)的NiO纳米薄膜，并以此作为空穴传输层，结合Cs2AgBiBr6吸光层与Cs2AgInCl6电子传输层，构建了全无机无铅钙钛矿光电探测器件。系统研究了Cu掺杂对NiO空穴传输层微结构及相应器件性能的调控作用。结果表明，适量Cu掺杂有助于形成致密均匀的NiO薄膜；基于4% Cu掺杂NiO薄膜的器件展现出最优性能，其暗电流显著降低，在弱光条件下(入射光功率密度为2.745 mW/cm2)光响应度达149 mA/W，比探测率高达5.6 × 1011 Jones，较纯NiO器件提升约两个数量级，表现出优异的弱光探测能力。
Abstract: All-inorganic lead-free perovskite photodetectors have attracted considerable attention due to their excellent physicochemical properties, among which the carrier transport layer plays a decisive role in device performance. In this work, NiO nanofilms with various Cu doping concentrations (0, 3, 4, and 5 at %) were prepared on ITO substrates at room temperature via spin-coating, and employed as hole transport layers in conjunction with Cs2AgBiBr6 light-absorbing layers and Cs2AgInCl6 electron transport layers to construct all-inorganic lead-free perovskite photodetectors. The modulation effects of Cu doping on the microstructure of NiO and the corresponding device performance were systematically investigated. The results demonstrate that appropriate Cu doping facilitates the formation of compact and uniform NiO films. The device based on 4% Cu-doped NiO film exhibits optimal performance with significantly suppressed dark current. Under weak illumination (incident optical power density of 2.745 mW/cm2), the responsivity reaches 149 mA/W and the specific detectivity is as high as 5.6 × 1011 Jones, representing approximately two order of magnitude improvement compared to the pristine NiO device, indicating superior weak-light detection capability.
文章引用：方墁祺, 胡辉, 胡际达, 高云. Cu掺杂NiO空穴层修饰高性能全无机无铅钙钛矿紫外探测器[J]. 材料科学, 2026, 16(4): 167-179. https://doi.org/10.12677/ms.2026.164083

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