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Indexed by:
Journal paper
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First Author:
Yongqing Duan
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Correspondence Author:
YongAn Huang,Zhouping Yin
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Co-author:
Wenshuo Xie,Weili Yang,Hanyuan Zhang,Rui Yu
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Journal:
Advanced Materials
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Included Journals:
SCI
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Affiliation of Author(s):
State Key Laboratory of Digital Manufacturing Equipment and Technology
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Discipline:
Engineering
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Funded by:
the National Key Research and Development Program of China (2018YFA0703200)，etc.
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ISSN No.:
0935-9648
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Key Words:
graded micro/nanostructures, high-resolution printing, perovskite, pho-todetectors, spectrometer
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DOI number:
10.1002/adma.202313946
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Date of Publication:
2024-04-06
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Abstract:
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.
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Links to published journals:
