Collaborative Research: Block Copolymer Compatibilizers for Controlled Morphology and Interfacial Properties in Polymer-Fullerene Blends

PI先前已经发现，供体和受体域的分级形态导致电子转移的高产率、增强的激子解离和高功率转换效率（PCE）。在这项提案中，他们试图联合收割机理论和实验相结合，在一个协调的方法来操纵纳米结构的分级形态，以控制的方式，以量化的光电性能和太阳能电池的效率的不同形态的长度尺度的影响组成的半导体供体和富勒烯受体系统，PCBM。一种方法，以确保供体和受体相之间的接触增加是使用嵌段共聚物（BCP），PTB 7，作为？相容剂？以融合这两个阶段。他们的做法是找到什么？设计规则？是通过进行系统的实验-理论研究相结合的设计有效的相容剂在OPV应用的上下文中的OPV。他们的总体计划是合成PTB 7嵌段共聚物，测量模型聚合物嵌段、PTB 7和薄膜、多层共混物中富勒烯之间的相互作用参数，然后阐明和关联BHJ共混物的热力学和微观结构与PTB 7嵌段共聚物相容剂的本体异质结光致发光材料的形态和光电性能。

The PIs have previously found that a hierarchical morphology of donor and acceptor domains led to a high yield of electron transfer, enhanced exciton dissociation, and a high power conversion efficiency (PCE). In this proposal, they seek to combine theory and experiments in a coordinated approach to manipulate the nanostructured hierarchical morphologies in a controlled manner in order to quantify the influence of different morphological length scales on the optoelectronic properties and the efficiencies of solar cells composed of a semi-conducting donor and the fullerene acceptor system, PCBM. One way to ensure increased contact between the donor and acceptor phases is to use block copolymers (BCP), PTB7, as ?compatiblizers? to meld the two phases. Their approach is to find what the ?design rules? are for OPVs by undertaking a systematic combined experimental-theoretical investigation for designing efficient compatibilizers in the context of OPV applications. Their general plan is to synthesize PTB7 block copolymers, measure the ÷-interaction parameter between model polymer blocks, PTB7, and fullerene in thin film, multilayer blends, then elucidate and correlate the thermodynamics and microstructures of the BHJ blends to the morphology and optoelectronic properties of bulk heterojunction photovoltaics with PTB7 block copolymer compatibilizers.