High‐Performance All‐Polymer Photoresponse Devices Based on Acceptor–Acceptor Conjugated Polymers
High‐Performance All‐Polymer Photoresponse Devices Based on Acceptor–Acceptor Conjugated Polymers
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DOI：
10.1002/adfm.201601745
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发表时间：
2016-09
影响因子：
19
通讯作者：
Xiaofeng Wang;Lei Lv;Lingliang Li;Yusheng Chen;Kai Zhang;Haoran Chen;Huanli Dong;Jinsong Huang-Jinsong
中科院分区：
文献类型：
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作者：
Xiaofeng Wang;Lei Lv;Lingliang Li;Yusheng Chen;Kai Zhang;Haoran Chen;Huanli Dong;Jinsong Huang-Jinsong
设计并合成了三种基于异靛蓝和萘二亚胺/苝二亚胺的受体-受体（A-A）型共轭聚合物，研究了构建单元和烷基链对聚合物性质和全聚合物光响应器件性能的影响。通过热重分析、差示扫描量热法、紫外-可见法、循环伏安法和密度泛函理论计算可以看出，构建块和烷基链的变化会影响聚合物的热学、光学和电化学性能。基于A - A型共轭聚合物，实现了效率最高的全聚合物光伏电池，效率为2.68%，并构建了首个全聚合物光电探测器，具有较高的响应率（0.12 A W−1）和探测率（1.2 × 1012 Jones），可与目前最好的富勒烯基有机光电探测器和无机光电探测器相媲美。研究了共混薄膜的光致发光光谱、电荷输运性质和形貌，以阐明聚合物结构对器件性能的影响。这一贡献证明了系统地调整聚合物结构以实现高性能全聚合物光响应器件的策略。
Three acceptor–acceptor (A–A) type conjugated polymers based on isoindigo and naphthalene diimide/perylene diimide are designed and synthesized to study the effects of building blocks and alkyl chains on the polymer properties and performance of all‐polymer photoresponse devices. Variation of the building blocks and alkyl chains can influence the thermal, optical, and electrochemical properties of the polymers, as indicated by thermogravimetric analysis, differential scanning calorimetry, UV–vis, cyclic voltammetry, and density functional theory calculations. Based on the A–A type conjugated polymers, the most efficient all‐polymer photovoltaic cells are achieved with an efficiency of 2.68%, and the first all‐polymer photodetectors are constructed with high responsivity (0.12 A W−1) and detectivity (1.2 × 1012 Jones), comparable to those of the best fullerene based organic photodetectors and inorganic photodetectors. Photoluminescence spectra, charge transport properties, and morphology of blend films are investigated to elucidate the influence of polymeric structures on device performances. This contribution demonstrates a strategy of systematically tuning the polymeric structures to achieve high performance all‐polymer photoresponse devices.