The rational design of multifunctional materials with both emissive and semiconducting properties remains a challenge. A multifunctional cruciform donor–acceptor (D–A) molecule, 2,2′‐(((4,8‐bis(5‐(2‐ethylhexyl)thiophen‐2‐yl)benzo[1,2‐b:4,5‐b′]dithiophene‐2,6‐diyl)bis(thiophene‐5,2‐diyl))bis(methanylylidene))dimalononitrile (BDTTM), which contains a benzodithiophene as the central core, has been synthesized and, based on the output and transfer characteristics of the corresponding FETs, thin films of BDTTM exhibited ambipolar semiconducting behavior. Notably, FETs with thin films of BDTTM showed a photoresponse in both p‐ and n‐channels, and drain‐source‐current enhancement under white‐light irradiation could be detected, even at a low light intensity of 0.1 mW cm⁻². Furthermore, BDTTM exhibited red‐light emission both in solution and as a crystalline solid. A microplate of BDTTM with red‐light emission displayed typical optical waveguiding behavior.

中文翻译：

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具有双极/光敏半导体和红光发射特性的基于苯并二噻吩的十字形电子供体-电子受体分子

具有发射和半导体特性的多功能材料的合理设计仍然是一个挑战。多功能十字形供体-受体分子（2,2'-（（（4,8-bis（5-（2-乙基己基）噻吩-2-基）苯并[1,2-b：4，合成了以苯并二噻吩为中心的5‐b′]二噻吩‐2,6-‐二基）双（噻吩‐5,2-二基））双（甲炔基））二甲基腈（BDTTM）。在相应的FET的输出和传输特性下，BDTTM薄膜表现出双极性半导体行为。值得注意的是，带有BDTTM薄膜的FET在p ‐和n处都显示出光响应即使在0.1 mW cm ^-2的低光强度下，也可以检测到白光照射下的通道和漏源电流增强。此外，BDTTM在溶液中和作为结晶固体均显示出红光发射。带有红色发光的BDTTM微孔板表现出典型的光波导行为。