Solution-processed small molecule:fullerene bulk-heterojunction solar cells: impedance spectroscopy deduced bulk and interfacial limits to fill-factors

被引：75

作者：

Guerrero, Antonio ^{[1
]}

Loser, Stephen ^{[2
,3
]}

Garcia-Belmonte, Germa ^{[1
]}

Bruns, Carson J. ^{[4
,5
,6
]}

Smith, Jeremy ^{[2
,3
]}

Miyauchi, Hiroyuki ^{[2
,3
]}

Stupp, Samuel I. ^{[4
,5
,6
]}

Bisquert, Juan ^{[1
]}

Marks, Tobin J. ^{[2
,3
]}

机构：

[1] Univ Jaume 1, Dept Fis, Photovolta & Optoelect Devices Grp, ES-12071 Castellon de La Plana, Spain

[2] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

[3] Northwestern Univ, ANSER Ctr, Evanston, IL 60208 USA

[4] Northwestern Univ, Dept Chem, Dept Mat Sci & Engn, Evanston, IL 60208 USA

[5] Northwestern Univ, Dept Med, Chicago, IL 60611 USA

[6] Northwestern Univ, Inst BioNanotechnol Med, Chicago, IL 60611 USA

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2013年 / 15卷 / 39期

基金：

美国国家科学基金会;

关键词：

POLYMER PHOTOVOLTAIC CELLS; SMALL-MOLECULE; WORK FUNCTION; PERFORMANCE; RECOMBINATION; EFFICIENCY; VOLTAGE; MORPHOLOGY; DESIGN; CORE;

D O I：

10.1039/c3cp52363b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Using impedance spectroscopy, we demonstrate that the low fill factor (FF) typically observed in small molecule solar cells is due to hindered carrier transport through the active layer and hindered charge transfer through the anode interfacial layer (IFL). By carefully tuning the active layer thickness and anode IFL in BDT(TDPP)(2) solar cells, the FF is increased from 33 to 55% and the PCE from 1.9 to 3.8%. These results underscore the importance of simultaneously optimizing active layer thickness and IFL in small molecule solar cells.

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页码：16456 / 16462

页数：7

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