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3D Printing of Arbitrary Perovskite Nanowire Heterostructures |
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| Authors: | Mojun Chen Zhiwen Zhou Shiqi Hu Nan Huang Heekwon Lee Yu Liu Jihyuk Yang Xiao Huan Zhaoyi Xu Sixi Cao Xiang Cheng Ting Wang Siu Fung Yu Barbara Pui Chan Jinyao Tang Shien-Ping Feng Ji Tae Kim |
| Affiliation: | 1. Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, 999077 China Smart Manufacturing Thrust, Systems Hub, The Hong Kong University of Science and Technology, Guangzhou, 511458 China Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Hong Kong, 999077 China;2. Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, 999077 China Department of Electronic Engineering, Chinese University of Hong Kong, Hong Kong, 999077 China;3. Department of Mechanical Engineering, The University of Hong Kong, Hong Kong, 999077 China;4. Department of Chemistry, The University of Hong Kong, Hong Kong, 999077 China;5. Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, 999077 China;6. Department of Advanced Design and Systems Engineering, City University of Hong Kong, Hong Kong, 999077 China |
| Abstract: | Deterministic integration of arbitrary semiconductor heterostructures opens a new class of modern electronics and optoelectronics. However, the realization of such heterostructures continues to suffer from impracticality, requiring energy- and labor-intensive, time-consuming fabrication processes. Here a 3D printing approach to fabricate freestanding metal halide perovskite nanowire heterostructures with a high degree of control over shape and composition is demonstrated. These features arise from freeform guiding of evaporation-driven perovskite crystallization by a femtoliter precursor meniscus formed on a printing nozzle. By using a double-barreled nanopipette as a printing nozzle, “all-at-once” heterostructure fabrication is achieved within seconds. The 3D-printed perovskite nanowire heterojunctions with multiple emission colors provide exciting optical functionalities such as programmable color mixing and encryption at the single nanopixel level. This “lithography-free” additive approach opens up the possibility to freely design and realize heterostructure-based devices without the constraints of traditional manufacturing processes. |
| Keywords: | 3D printing double-barreled nanopipettes metal halide perovskite heterostructures nanowires |