Programmable, High-resolution Printing of Spatially Graded Perovskites for Multispectral Photodetectors
发布时间：2024-06-03
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- 论文类型：
- 期刊论文
- 第一作者：
- Yongqing Duan
- 通讯作者：
- YongAn Huang,Zhouping Yin
- 合写作者：
- Wenshuo Xie,Weili Yang,Hanyuan Zhang,Rui Yu
- 发表刊物：
- Advanced Materials
- 收录刊物：
- SCI
- 所属单位：
- State Key Laboratory of Digital Manufacturing Equipment and Technology
- 学科门类：
- 工学
- 项目来源：
- the National Key Research and Development Program of China (2018YFA0703200)，etc.
- ISSN号：
- 0935-9648
- 关键字：
- graded micro/nanostructures, high-resolution printing, perovskite, pho-todetectors, spectrometer
- DOI码：
- 10.1002/adma.202313946
- 发表时间：
- 2024-04-06
- 摘要：
- Micro/nanostructured perovskites with spatially graded compositions and bandgaps are promising in filter-free, chip-level multispectral, and hyperspectral detection. However, achieving high-resolution patterning of perovskites with controlled graded compositions is challenging. Here, a programmable mixed electrohydrodynamic printing (M-ePrinting) technique is presented to realize the one-step direct-printing of arbitrary spatially graded perovskite micro/nanopatterns for the first time. M-ePrinting enables in situ mixing and ejection of solutions with controlled composition/bandgap by programmatically varying driving voltage applied to a multichannel nozzle. Composition can be graded over a single dot, line or complex pattern, and the printed feature size is down to 1 µm, which is the highest printing resolution of graded patterns to the knowledge. Photodetectors based on micro/nanostructured perovskites with halide ions gradually varying from Br to I are constructed, which successfully achieve multispectral detection and full-color imaging, with a high detectivity and responsivity of 3.27 × 1015 Jones and 69.88 A W−1, respectively. The presented method provides a versatile and competitive approach for such miniaturized bandgap-tunable perovskite spectrometer platforms and artificial vision systems, and also opens new avenues for the digital fabrication of composition-programmable structures.