High Efficiency Air-Processed Dithienogermole-Based Polymer Solar Cells

被引：28

作者：

Constantinou, Iordania ^{[1
]}

Lai, Tzung-Han ^{[1
]}

Zhao, Dewei ^{[1
]}

Klump, Erik D. ^{[1
]}

Deininger, James J. ^{[2
]}

Lo, Chi Kin ^{[2
]}

Reynolds, John R. ^{[2
]}

So, Franky ^{[1
]}

机构：

[1] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

[2] Georgia Inst Technol, Sch Chem & Biochem, Sch Mat Sci & Engn, Ctr Organ Photon & Elect, Atlanta, GA 30332 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 08期

关键词：

solar cells; organic photovoltaics; air processing conjugated polymers; dithienogermole; fullerenes; charge mobility; POWER CONVERSION EFFICIENCY; TO-ROLL FABRICATION; HIGH-PERFORMANCE; THIN-FILMS; PHOTOVOLTAIC DEVICES; OPTICAL-ABSORPTION; LARGE-AREA; STABILITY; OXYGEN; DEGRADATION;

D O I：

10.1021/am5087566

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of air processing, with air exposure varying from minutes to hours prior to encapsulation, on photovoltaic device performance has been studied through a series of electrical characterizations and optical simulations for a donor/acceptor polymer-based organic solar cell based on poly(dithienogermole-alt-thienopyrrolodione) p(DTG-TPD)/PC71BM blends. A similar to 10% degradation in power conversion efficiency was observed due to air processing with 10 min exposure time, with AM1.5 power conversion efficiencies (PCEs) decreasing from 8.5 +/- 0.25% for devices processed in inert nitrogen atmosphere to 7.7 +/- 0.18% for devices processed in ambient air. After 3 h air exposure, the PCE leveled off at 7.04 +/- 0.1%. This decrease is attributed partially to interface issues caused by exposure of the electrode materials to oxygen and water and partially to a degradation of the hole transport in the active layer.

引用

页码：4826 / 4832

页数：7

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