Chiroptical‐Conjugated Polymer/Chiral Small Molecule Hybrid Thin Films for Circularly Polarized Light‐Detecting Heterojunction Devices,Advanced Functional Materials

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Chiroptical‐Conjugated Polymer/Chiral Small Molecule Hybrid Thin Films for Circularly Polarized Light‐Detecting Heterojunction Devices
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2019-01-28 , DOI: 10.1002/adfm.201808668
Na Yeon Kim _{1,

2} , Jihoon Kyhm ₃ , Hyemi Han ₁ , Soo Jin Kim _{1,

4} , Jongtae Ahn ₁ , Do Kyung Hwang _{1,

5} , Ho Won Jang ₄ , Byeong-Kwon Ju ₂ , Jung Ah Lim _{1,

5}

Affiliation

Herein, a simple and facile strategy is described to obtain chiroptically active semiconductor thin films by blending of poly(3‐alkylthiophene)s, which are conventional achiral polymer semiconductors, and 1,1′‐binaphthyl (BN), a versatile chiral molecule. As expected, the intermolecular interaction between the two materials is important to extend the chirality of the binaphthyl molecules to the hybrid films. The controlled phase separation and crystallization of poly[3‐(6‐carboxyhexyl)thiophene‐2,5‐diyl] (P3CT) and binaphthyl hybrid films result in unique heterojunction bilayer thin‐film structures that consisted of BN microcrystals at the top and a P3CT/BN mixed layer at the bottom. Such heterojunction bilayer films exhibit significantly amplified chiroptical response with weak broadened tails, which is due to the enhanced crystallization of the chiral BN molecules and formation of heteroaggregates in the hybrid films. Based on the characterization of crystalline structure and photoluminescence analysis, it is found that new electronic energy states are formed in the conduction band region of P3CTs in the P3CT/BN heteroaggregates, which contribute to chirality transfer from BN to the hybrid films. As a proof of concept, a photodiode capable of distinguishably sensing the left‐ and right‐handed circularly polarized light is successfully fabricated by using the hybrid films with the heterojunction bilayer structure.

中文翻译：

用于圆偏振光检测异质结器件的手性共轭聚合物/手性小分子混合薄膜

本文中，描述了一种简单而又容易实现的策略，该方法通过将作为常规非手性聚合物的聚（3-烷基噻吩）与一种通用的手性分子1,1'-联萘基（BN）混合来获得具有手性的半导体薄膜。如所期望的，两种材料之间的分子间相互作用对于将双萘基分子的手性扩展至杂化膜是重要的。聚[3-（6-羧基己基）噻吩-2,5-二基]（P3CT）和双萘杂化薄膜的受控相分离和结晶导致独特的异质结双层薄膜结构，该结构由顶部的BN微晶和P3CT / BN混合层位于底部。这样的异质结双层膜显示出明显的手性反应，尾巴变弱，这归因于手性BN分子结晶的增强和杂化膜中杂聚集体的形成。基于晶体结构的表征和光致发光分析，发现在P3CT / BN杂聚集体中的P3CT的导带区域中形成了新的电子能态，这有助于从BN向杂化膜的手性转移。作为概念的证明，通过使用具有异质结双层结构的杂化膜，可以成功地制造出能够区分左旋和右旋圆偏振光的光电二极管。发现在P3CT / BN杂聚集体中的P3CT的导带区域中形成了新的电子能态，这有助于从BN向杂化膜的手性转移。作为概念的证明，通过使用具有异质结双层结构的杂化膜，可以成功地制造出能够区分左旋和右旋圆偏振光的光电二极管。发现在P3CT / BN杂聚集体中的P3CT的导带区域中形成了新的电子能态，这有助于从BN向杂化膜的手性转移。作为概念的证明，通过使用具有异质结双层结构的杂化膜，可以成功地制造出能够区分左旋和右旋圆偏振光的光电二极管。

更新日期：2019-01-28

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