The preparation of high-quality perovskite films with optimal morphologies is important for achieving high-performance perovskite photodetectors (PPDs). An effective strategy to optimize the morphologies is to add antisolvents during the spin-coating steps. In this work, a novel environment-friendly antisolvent tert-amyl alcohol (TAA) is employed first to improve the quality of perovskite films, which can effectively regulate the formation of an intermediate phase staged in between a liquid precursor phase and a solid perovskite phase due to its moderate polarity and further promote the homogeneous nucleation and crystal growth, thus leading to the formation of high-quality perovskite films and enhanced photodetector performance. As a result, the responsivity of the PPD reaches 1.56 A/W under the illumination of 532 nm laser with the power density of $6.37\mathrm{\mu W}\text{/}{\mathrm{cm}}^2$ at a bias voltage of $-2\mathrm{V}$, which is good responsivity for PPDs with the vertical structure and only ${\mathrm{CH}}_3{\mathrm{NH}}_3{\mathrm{PbI}}_3$ perovskite as the photosensitive material. The corresponding detectivity reaches $1.47\times {10}^{12}$ Jones, while the linear dynamic range reaches 110 dB. These results demonstrate that our developed green antisolvent TAA has remarkable advantages for the fabrication of high-performance PPDs and can provide a reference for similar research work.

中文翻译：

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高响应性的环保型抗溶剂叔戊醇改性杂化钙钛矿光电探测器

制备具有最佳形态的高质量钙钛矿薄膜对于实现高性能钙钛矿光电探测器（PPD）至关重要。优化形态的有效策略是在旋涂步骤中添加抗溶剂。在这项工作中，首先使用一种新型的环保型抗溶剂叔戊醇（TAA）来改善钙钛矿薄膜的质量，该钙钛矿薄膜可以有效地调节在液态前体相和固态钙钛矿相之间形成的中间相的形成。由于其适度的极性并进一步促进了均匀的成核和晶体生长，从而导致形成高质量的钙钛矿薄膜并增强了光电探测器的性能。结果，PPD的响应度达到1。$6.37\mathrm{微瓦}\text{/}{\mathrm{厘米}}^{\mathrm{2个}}$ 在偏置电压为 $-\mathrm{2个}\mathrm{伏特}$，这对于仅具有垂直结构的PPD具有良好的响应能力 ${\mathrm{CH}}_3{\mathrm{NH}}_3{铅}_3$钙钛矿作为光敏材料。相应的侦探率达到$1.47\times {10}^{12}$琼斯，而线性动态范围达到110 dB。这些结果表明，我们开发的绿色抗溶剂TAA在制备高性能PPD方面具有显着优势，并可以为类似的研究工作提供参考。