题目：

Correlation between Polymer Molecular Weight and Optimal Fullerene Content in Efficient Polymer Solar Cells

作者：

Jinan Gu, Jianyu Yuan and Wanli Ma*

单位：

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University

摘要：

In this contribution, a donor-acceptor (D-A) copolymer PTP8, consisting of alternating benzodithiophene and thienopyrroledione with conjugated side-chains on both donor and acceptor units, was successfully prepared. We further investigated the effect of polymer molecular weight on polymer physicochemical properties, solar cell device performance, polymer-PCBM blend morphology, and, most importantly, polymer/PCBM blend ratio. We found that increasing the molecular weight of the donor polymer can both effectively improve the device performance and simultaneously stabilize solar cell efficiency over a wide range of polymer/PCBM blend ratios (from 1:0.5 to 1:1.0), which may lead to more thermally stable and cost-effective devices. Through intensive morphological investigation, we propose a sound morphological evolution for PTP8/PCBM blends with different molecular weights at low fullerene content.

影响因子：

3.827

分区情况：

2区

链接：

http://www.sciencedirect.com/science/article/pii/S1566119916301483

(责任编辑：杨阳，联系方式：yangyangcnst@suda.edu.cn)