Details

Autor(en) / Beteiligte

• Li, Yin‐Xiang
• Dong, Xue‐Mei
• Yu, Meng‐Na
• Liu, Wei
• Nie, Yi‐Jie
• Zhang, Jing
• Xie, Ling‐Hai
• Xu, Chun‐Xiang
• Liu, Ju‐Qing
• Huang, Wei

Titel

A Bio‐Inspired Molecular Design Strategy toward 2D Organic Semiconductor Crystals with Superior Integrated Optoelectronic Properties

Ist Teil von

• Small (Weinheim an der Bergstrasse, Germany), 2021-08, Vol.17 (34), p.e2102060-n/a

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2021

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• Inspired by the 2D bilayer lipid membranes in nature, a unique supramolecular “push–pull” synergetic strategy toward self‐assembled 2D organic crystals (2DOCs) is proposed in this work, which can effectively suppress the interlayer 3D stacking while maintaining the assembly of the intralayer for 2D growth. For this purpose, a model molecule PF‐Py consisting of a planar supramolecular “attractor” and a nonplanar steric “repellor” is designed for the solution self‐assembly process. Well‐defined 2DOCs including crystal nanosheets and millimeter‐sized crystal films with layered amphiphile‐like packing are obtained, which is analogical to the cell membranes of living organisms. Thanks to the special packing mode, the 2DOCs have fascinating integrated photoelectric property, with high mobility of 7.8 × 10−2 cm2 V−1 s−1, high crystalline state photoluminescence quantum yield of 55%, and superior deep‐blue laser characteristics with a low threshold of 5.51 µJ cm−2. This supramolecular synergetic strategy advances the design of 2D organic semiconductor crystals for high performance optoelectronics. Rational molecular design strategy toward 2D organic crystals (2DOCs) is necessary but rare. Here, a novel supramolecular “push–pull” strategy to guide the molecular design by integrating a planar segment and a nonplanar group into one molecule is developed. Thanks to the synergetic effect of the two groups, size controllable 2DOCs with superior integrated photoelectric property are realized.