期刊
CHEMISTRY OF MATERIALS
卷 25, 期 24, 页码 4874-4880出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm4024259
关键词
bulk heterojunction; solar cells; conjugated polymers; side-chain engineering; isoindigo; polystyrene; organic electronics; solution process; thin films
资金
- National Science Foundation [DMR-1006989]
- Defense Advanced Research Projects Agency (QuBE) Air Force Office of Scientific Research [FA9550-12-1-0190]
- Camille and Henry Dreyfus Postdoctoral Program in Environmental Chemistry
- Department of Energy, Laboratory Directed Research and Development [DE-AC02-76SF00515]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1006989] Funding Source: National Science Foundation
Developing organic photovoltaic systems that possess high efficiency, high reproducibility, and low cost remains a topic of keen investigation. From a molecular design perspective, developing a multicomponent copolymerization synthetic approach could potentially afford macromolecular materials encompassing all of the aforementioned desired parameters. Herein, we describe the synthesis of a series of poly(isoindigo-dithiophene)-based conjugated polymers with varying amounts of low molecular weight polystyrene (PS) side chains (M-n = 1300 g/mol) via random copolymerization. We observed better solubility with polymers containing the PS chains (when compared to their non-PS-side-chain counterparts), hence leading to better batch-to-batch reproducibility in terms of molecular weights. Furthermore, the PS-side-chain-decorated copolymers also demonstrated better thin film processability, without affecting the electronic and optical properties, when the molar percentage of the PS-containing repeating units were <= 0%. Bulk heterojunction solar cell devices fabricated with these PS-containing copolymers demonstrated significantly improved performances [maximum power conversion efficiencies (PCE) > 7% and open circuit voltages (V-OC) >= 0.95 V], compared to the highest reported performance (PCE = 6.3% and V-OC = 0.70) based on similar isoindigo-containing polymers. Taken together, the synthesis, processing, and device performances of PS-containing copolymers represent a new approach in molecular engineering to achieve a balance between the optical/electronic properties and solubility/processability of reproducible polymeric systems.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据