Interface engineering via photopolymerization-induced phase separation for flexible UV-responsive phototransistors
Interface engineering via photopolymerization-induced phase separation for flexible UV-responsive phototransistors
复制标题
通过光聚合诱导相分离实现柔性紫外响应光电晶体管的界面工程
DOI：
10.1021/acsami.7b19371
复制
发表时间：
2018
影响因子：
9.5
通讯作者：
Vellaisamy A. L. Roy
中科院分区：
文献类型：
--
作者：
Haiyan Peng;Yan Yan;Yingkui Yang;Li Zhou;Wei Wu;Qijun Sun;Jiaqing Zhuang;Su-Ting Han;Chi-Chiu Ko;Zongxiang Xu;Xiaolin Xie;Robert K. Y. Li;Vellaisamy A. L. Roy
界面工程已被公认为在新兴光电子学中实现有效的电荷分离、电荷载流子传输和增强器件性能的关键。然而，使用现有技术精确控制界面结构仍然是一个艰巨的挑战。在这里，我们展示了一种简单而通用的协议，其中原位硫醇-烯点击光聚合诱导相分离用于构建异质结半导体界面。这种方法产生了连续的山形异质结界面，有利于在界面上有效地进行激子解离，同时为界面上方的空穴传输提供了连续的导电区。这种灵活的低温模式对刚性和柔性衬底都具有良好的适应性，提供了高性能的UV响应型光电晶体管，归一化探测率高达6.3×1014 cm Hz1/2W-1(也称为Jones)。此外，还进行了基于非原位光聚合和原位热聚合的控制实验，验证了该方法的优越性。
Interface engineering has been recognized to be substantially critical for achieving efficient charge separation, charge carrier transport, and enhanced device performance in emerging optoelectronics. Nevertheless, precise control of the interface structure using current techniques remains a formidable challenge. Herein, we demonstrate a facile and versatile protocol wherein in situ thiol–ene click photopolymerization-induced phase separation is implemented for constructing heterojunction semiconductor interfaces. This approach generates continuous mountainlike heterojunction interfaces that favor efficient exciton dissociation at the interface while providing a continuous conductive area for hole transport above the interface. This facile low-temperature paradigm presents good adaptability to both rigid and flexible substrates, offering high-performance UV-responsive phototransistors with a normalized detectivity up to 6.3 × 1014cm Hz1/2W–1(also called jones). Control experiments based on ex situ photopolymerization and in situ thermal polymerization are also implemented to demonstrate the superiority of this novel paradigm.