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

PI已经发现，施主和受主结构域的分级形态导致了电子转移的高产率、增强的激子解离和高的功率转换效率(PCE)。在这个提议中，他们试图以协调的方法将理论和实验结合起来，以受控的方式操纵纳米结构的分级形态，以便量化不同形态长度尺度对由半导体施主和富勒烯受体系统PCBM组成的太阳能电池的光电性能和效率的影响。确保给体相和受体相之间接触增加的一种方法是使用嵌段共聚物(BCP)PTB7作为相容剂。把这两个阶段融合起来。他们的方法是找出设计规则是什么？是通过进行系统的实验-理论相结合的研究，在口服脊髓灰质炎疫苗应用的背景下设计有效的相容剂。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块PTB7与富勒烯之间的？相互作用参数，然后阐明并关联BHJ共混物的热力学和微观结构与含PTB7嵌段共聚物相容剂的体相异质结光伏器件的形态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.