A collaborative dendritic perovskite microcrystal with a built-in optical microcavity in the 3D-heterostructure device was synthesized to obtain ultraviolet narrowband detection by narrowing the double response edge. The two reflection oscillation modes of the four pyramid optical cavities constructed within perovskite microcrystals promote photogenerated charge carriers’ attachment to the crystal side along the light reflection trajectory. The radial capacitance unique to the 3D heterojunction in this device guides the recombination of long wavelength charges gathered on the crystal surface, thus eliminating long-wavelength photoresponse to obtain an ultraviolet narrowband. As a result of the simultaneous narrowing of the response from both sides, a specific narrowband ultraviolet response with a full width at half-maximum (fwhm) of less than 40 nm is obtained. The synergistic effect of three regions in the dendritic microcrystals is used to capture photons and transport and confine charges, breaking through the limitation of the responsivity of a single microcrystalline unit to the same level of response as large-area polycrystalline devices.

中文翻译：

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用于紫外窄带光电探测器的协作树枝状钙钛矿微晶中基于嵌入式微尺寸单晶的内置 3D 异质结光学微腔


合成了一种在 3D 异质结构器件中具有内置光学微腔的协作树枝状钙钛矿微晶，通过缩小双响应边缘获得紫外窄带检测。钙钛矿微晶内构建的四个金字塔形光腔的两种反射振荡模式促进了光生载流子沿光反射轨迹附着在晶体侧。该器件中 3D 异质结独有的径向电容引导聚集在晶体表面的长波长电荷的复合，从而消除长波长光响应以获得紫外窄带。由于两侧的响应同时变窄，获得了半峰全宽 （fwhm） 小于 40 nm 的特异性窄带紫外响应。树枝状微晶中三个区域的协同作用用于捕获光子并传输和限制电荷，突破了单个微晶单元的响应性限制，使其响应水平与大面积多晶器件相同。