Development of a donor polymer using a B <- N unit for suitable LUMO/HOMO energy levels and improved photovoltaic performance

	Development of a donor polymer using a B <- N unit for suitable LUMO/HOMO energy levels and improved photovoltaic performance
	Zhang,Zijian; Ding,Zicheng; Dou,Chuandong; Liu,Jun; Wang,Lixiang
刊名	polymer chemistry
	2015
卷号	6 期号:46 页码:8029-8035
关键词	HETEROJUNCTION SOLAR-CELLS 25TH ANNIVERSARY ARTICLE OPEN-CIRCUIT VOLTAGE LOW-BANDGAP POLYMER CONJUGATED POLYMERS DEVICE PERFORMANCE MOLECULAR DESIGN EFFICIENCY COPOLYMERS DERIVATIVES
通讯作者	dou,cd
英文摘要	the lumo/homo energy levels of conjugated polymers are key parameters for their applications as polymer electron donors for polymer solar cells (pscs). the widely-used strategy to tune the lumo/homo levels of polymer donors is to develop d-a type polymers based on an alternating electron-donating unit (d) and an electron-accepting unit (a). in this paper, we report a novel approach to tune the lumo/homo levels of polymer donors via replacing a c-c unit by a b <- n unit for enhanced psc device performance. the control polymer pcpdt shows the lumo/homo levels of -2.71 ev/-4.98 ev, which are both much higher than those required for an ideal polymer donor. by replacing a c-c unit with a b <- n unit, the resulting polymer pbncpdt exhibits much lower lumo/homo levels of -3.23 ev/-5.20 ev. pbncpdt also shows a narrower optical bandgap (e-g = 1.73 ev) than that (e-g = 1.85 ev) of pcpdt, which is helpful for harvesting of sunlight. moreover, pbncpdt with the b <- n unit is not a typical d-a type conjugated polymer because its lumo and homo are both delocalized over the whole conjugated framework. as the control psc device based on pcpdt exhibits an open-circuit voltage (v-oc) of 0.45 v and power conversion efficiency (pce) of 0.63%, the device of pbncpdt shows much improved v-oc of 0.82 v and pce of 3.74%. these results indicate that a b <- n unit can be used to develop polymer donors for high-performance psc devices.
收录类别	SCI
语种	英语
WOS记录号	WOS:000365218000012
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/64867]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Zhang,Zijian,Ding,Zicheng,Dou,Chuandong,et al. Development of a donor polymer using a B <- N unit for suitable LUMO/HOMO energy levels and improved photovoltaic performance[J]. polymer chemistry,2015,6(46):8029-8035.
APA	Zhang,Zijian,Ding,Zicheng,Dou,Chuandong,Liu,Jun,&Wang,Lixiang.(2015).Development of a donor polymer using a B <- N unit for suitable LUMO/HOMO energy levels and improved photovoltaic performance.polymer chemistry,6(46),8029-8035.
MLA	Zhang,Zijian,et al."Development of a donor polymer using a B <- N unit for suitable LUMO/HOMO energy levels and improved photovoltaic performance".polymer chemistry 6.46(2015):8029-8035.