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Semiconducting Copolymers Based on meso‐Substituted BODIPY for Inverted Organic Solar Cells and Field‐Effect Transistors
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2017-12-11 , DOI: 10.1002/aelm.201700354 Mehmet Ozdemir 1 , Sang Woo Kim 2 , Hyungsug Kim 3 , Myung-Gil Kim 4 , Bumjoon J. Kim 2 , Choongik Kim 3 , Hakan Usta 1
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2017-12-11 , DOI: 10.1002/aelm.201700354 Mehmet Ozdemir 1 , Sang Woo Kim 2 , Hyungsug Kim 3 , Myung-Gil Kim 4 , Bumjoon J. Kim 2 , Choongik Kim 3 , Hakan Usta 1
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The synthesis, physicochemical, and optoelectronic properties of a new class of low band‐gap (≈1.3 eV) donor–acceptor copolymers based on a highly electron‐deficient meso‐5‐(2‐octyldodecyl)thiophene‐substituted BODIPY π‐unit are presented. The polymeric solutions exhibit strong aggregation‐dependent excitonic properties indicating the presence of enhanced π‐coherence as a result of strong interchain interactions. The polymeric semiconductor thin films prepared by spin coating show isotropic nodule‐like grains with essentially no ordering in the out‐of‐plane direction. Field‐effect hole mobilities of 0.005 cm2 V−1·s−1 are observed in bottom‐gate top‐contact organic field‐effect transistors, and inverted bulk‐heterojunction organic photovoltaics employing the polymer:PC71BM active layer exhibit excellent power conversion efficiencies of 6.2% with a short‐circuit current of 16.6 mA cm−2. As far as it is known, this is a record high value achieved to date for a boron‐containing donor polymer in the photovoltaic literature indicating a significant enhancement in power conversion efficiency (>3–4 times). The findings clearly present that rationally designed BODIPY‐based donor–acceptor copolymers can be a key player in photovoltaic applications.
中文翻译：
基于介观BODIPY的半导电共聚物，用于倒置有机太阳能电池和场效应晶体管
基于高度缺电子的内消旋-5-（2-辛基十二烷基）噻吩取代的BODIPYπ-单元的新型低带隙（≈1.3eV）供体-受体共聚物的合成，物理化学和光电性质为呈现。聚合物溶液表现出强的聚集依赖性激子性质，表明由于强烈的链间相互作用，增强了π相干性。通过旋涂制备的聚合物半导体薄膜显示出各向同性的结节状晶粒，在平面外方向上基本上没有顺序。0.005 cm 2 V -1 ·s -1的场效应空穴迁移率在底栅顶接触型有机场效应晶体管中观察到，和倒置体异质结采用聚合物有机光伏器件：PC 71个BM有源层表现出优异的功率转换的6.2％与16.6毫安厘米的短路电流效率- 2。据了解，这是迄今为止光伏文献中含硼供体聚合物达到的创纪录的高值，表明功率转换效率显着提高（> 3-4倍）。研究结果清楚地表明，合理设计的基于BODIPY的供体-受体共聚物可以在光伏应用中发挥关键作用。
更新日期：2017-12-11
中文翻译：
基于介观BODIPY的半导电共聚物，用于倒置有机太阳能电池和场效应晶体管
基于高度缺电子的内消旋-5-（2-辛基十二烷基）噻吩取代的BODIPYπ-单元的新型低带隙（≈1.3eV）供体-受体共聚物的合成，物理化学和光电性质为呈现。聚合物溶液表现出强的聚集依赖性激子性质，表明由于强烈的链间相互作用，增强了π相干性。通过旋涂制备的聚合物半导体薄膜显示出各向同性的结节状晶粒，在平面外方向上基本上没有顺序。0.005 cm 2 V -1 ·s -1的场效应空穴迁移率在底栅顶接触型有机场效应晶体管中观察到，和倒置体异质结采用聚合物有机光伏器件：PC 71个BM有源层表现出优异的功率转换的6.2％与16.6毫安厘米的短路电流效率- 2。据了解，这是迄今为止光伏文献中含硼供体聚合物达到的创纪录的高值，表明功率转换效率显着提高（> 3-4倍）。研究结果清楚地表明，合理设计的基于BODIPY的供体-受体共聚物可以在光伏应用中发挥关键作用。
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