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

pi先前已经发现，供体和受体结构域的分层形态导致高电子转移收率，增强激子解离和高功率转换效率（PCE）。在本提案中，他们试图将理论和实验相结合，以一种协调的方法来控制纳米结构的分层形态，以量化不同形态长度尺度对半导体供体和富勒烯受体系统（PCBM）组成的太阳能电池的光电性能和效率的影响。增加供体相和受体相接触的一种方法是使用嵌段共聚物（BCP） PTB7作为相容剂。将两相融合。他们的方法是找到什么？设计规则?通过系统的结合实验和理论的研究，为OPV应用设计高效的相容剂。他们的总体计划是合成PTB7嵌段共聚物，测量薄膜、多层共混物中模型聚合物嵌段、PTB7和富勒烯之间的÷-interaction参数，然后阐明BHJ共混物的热力学和微观结构与PTB7嵌段共聚物相容剂的体异质结光伏的形貌和光电性能之间的关系。

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.