甲脒
光致发光
光化学
磺酸盐
纳米晶
化学
卤化物
键裂
材料科学
量子产额
配体(生物化学)
光电子学
纳米技术
无机化学
有机化学
催化作用
光学
受体
物理
荧光
钠
生物化学
作者
Jia‐Ahn Pan,Justin C. Ondry,Dmitri V. Talapin
出处
期刊:Nano Letters
[American Chemical Society]
日期:2021-09-03
卷期号:21 (18): 7609-7616
被引量:36
标识
DOI:10.1021/acs.nanolett.1c02249
摘要
Microscale patterning of solution-processed nanomaterials is important for integration in functional devices. Colloidal lead halide perovskite (LHP) nanocrystals (NCs) can be particularly challenging to pattern due to their incompatibility with polar solvents and lability of surface ligands. Here, we introduce a direct photopatterning approach for LHP NCs through the binding and subsequent cleavage of a photosensitive oxime sulfonate ester (−C═N–OSOO−). The photosensitizer binds to the NCs through its sulfonate group and is cleaved at the N–O bond during photoirradiation with 405 nm light. This bond cleavage decreases the solubility of the NCs, which allows patterns to emerge upon development with toluene. Postpatterning ligand exchange results in photoluminescence quantum yields of up to 79%, while anion exchange provides tunability in the emission wavelength. The patterned NC films show photoconductive behavior, demonstrating that good electrical contact between the NCs can be established.
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