The quantum dot spectrometer, fabricated by integrating different quantum dots with an image sensor to reconstruct the target spectrum from spectral-coupled measurements, is an emerging and promising hyperspectrometry technology with high resolution and a compact size. The spectral resolution and spectral range of quantum dot spectrometers have been limited by the spectral variety of the available quantum dots and the robustness of algorithmic reconstruction. Moreover, the spectrometer integration of quantum dots also suffers from inherent photoluminescence emission and poor batch-to-batch repeatability. In this work, we developed nonemissive in situ fabricated MA3Bi2X9 and Cs2SnX6 (MA = CH3NH3; X = Cl, Br, I) perovskite-quantum-dot-embedded films (PQDFs) with precisely tunable transmittance spectra for quantum dot spectrometer applications. The resulting PQDFs contain in situ fabricated perovskite nanocrystals with homogenous dispersion in a polymeric matrix, giving them advantageous features such as high transmittance efficiency and good batch-to-batch repeatability. By integrating a filter array of 361 kinds of PQDFs with a silicon-based photodetector array, we successfully demonstrated the construction of a perovskite quantum dot spectrometer combined with a compressive-sensing-based total-variation optimization algorithm. A spectral resolution of ~1.6 nm was achieved in the broadband of 250-1000 nm. The performance of the perovskite quantum dot spectrometer is well beyond that of human eyes in terms of both the spectral range and spectral resolution. This advancement will not only pave the way for using quantum dot spectrometers for practical applications but also significantly impact the development of artificial intelligence products, clinical treatment equipment, scientific instruments, etc.

中文翻译：

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宽带钙钛矿量子点光谱仪超越了人类的视觉分辨率。

通过将不同的量子点与图像传感器集成在一起以从光谱耦合测量中重建目标光谱而制造的量子点光谱仪是一种新兴且有前途的高光谱技术，具有高分辨率和紧凑的尺寸。量子点光谱仪的光谱分辨率和光谱范围受到可用量子点的光谱变化和算法重建的鲁棒性的限制。而且，量子点的光谱仪集成还遭受固有的光致发光发射和差的批次间可重复性。在这项工作中，我们开发了无辐射原位制造的MA3Bi2X9和Cs2SnX6（MA = CH3NH3; X = Cl，Br，I）钙钛矿量子点嵌入式薄膜（PQDFs），具有可精确调谐的透射光谱，适用于量子点光谱仪应用。所得的PQDF包含原位制造的钙钛矿纳米晶体，该纳米晶体在聚合物基质中具有均匀的分散性，使其具有诸如高透射效率和良好的批次间可重复性的优点。通过将361种PQDF的滤光片阵列与基于硅的光电探测器阵列集成在一起，我们成功地证明了钙钛矿量子点光谱仪与基于压缩感测的总变化优化算法相结合的构造。在250-1000 nm的宽带中实现了〜1.6 nm的光谱分辨率。就光谱范围和光谱分辨率而言，钙钛矿量子点光谱仪的性能远远超过人眼。