Hyperspectral imaging (HSI) with rich spectral and spatial information holds potential for applications ranging from remote sensing to biomedicine. However, charge-coupled device (CCD) detectors used in conventional HSI systems suffer from inferior and unbalanced responsivity in the visible region, which is not a perfect choice for high-performance visible HSI. That is, conventional Si-based CCDs exhibit poor responsivity at short wavelengths (e.g., 400–600 nm) compared with that at longer wavelengths due to the nature of the indirect bandgap in silicon of around 1.1 eV. To solve this challenge, we introduce a ${\text{CsPbBr}}_3$ perovskite layer to shape the spectrum of a Si/PEDOT:PSS heterojunction photodetector (PD), resulting in a fabricated Si-${\text{CsPbBr}}_3$ hybrid PD with enhanced responsivity at 400–600 nm. This results in an approximately flat spectral responsivity curve in the visible region (400–800 nm). Therefore, the stable $\mathrm{Si}-{\text{CsPbBr}}_3$ hybrid PD with a flat spectrum overcomes the shortcomings of traditional Si-based PDs and makes it more suitable for HSI. Further, we set up a first perovskite HSI system with high spectrum resolution and demonstrate potential applications for tumor detection and tissue identification. We believe that this perovskite optimization can be integrated into modern CCD, thus becoming a step in future CCD fabrication processes, which is a milestone for high-performance HSI systems.

中文翻译：

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用于高光谱生物成像的光谱形硅钙钛矿混合光电探测器

具有丰富光谱和空间信息的高光谱成像 (HSI) 具有从遥感到生物医学的应用潜力。然而，传统 HSI 系统中使用的电荷耦合器件 (CCD) 探测器在可见光区域存在较差且不平衡的响应度，这不是高性能可见光 HSI 的完美选择。也就是说，由于硅中大约 1.1 eV 的间接带隙的性质，传统的基于硅的 CCD 在短波长（例如，400-600 nm）下的响应性比在较长波长下的响应性差。为了解决这个挑战，我们引入了一个${\text{溴化铅}}_3$ 钙钛矿层来塑造 Si/PEDOT:PSS 异质结光电探测器 (PD) 的光谱，从而形成制造的 Si-${\text{溴化铅}}_3$混合 PD，在 400-600 nm 处具有增强的响应度。这导致可见光区域 (400–800 nm) 中的光谱响应曲线大致平坦。因此，稳定$硅-{\text{溴化铅}}_3$具有平坦频谱的混合PD克服了传统Si基PD的缺点，使其更适合HSI。此外，我们建立了第一个具有高光谱分辨率的钙钛矿 HSI 系统，并展示了在肿瘤检测和组织识别方面的潜在应用。我们相信这种钙钛矿优化可以集成到现代 CCD 中，从而成为未来 CCD 制造工艺的一个步骤，这是高性能 HSI 系统的里程碑。