Morphology dependent electron transport in an n-type electron accepting small molecule for solar cell applications

被引：6
作者：
Krueger, Karsten B. [1 ]
Schwenn, Paul E. [1 ]
Gui, Ke [1 ]
Pivrikas, Almantas [2 ]
Meredith, Paul [1 ]
Burn, Paul L. [1 ]
机构：
[1] Univ Queensland, Ctr Organ Photon & Elect, Brisbane, Qld 4072, Australia
[2] Johannes Kepler Univ Linz, Linz Inst Organ Solar Cells LIOS, A-4040 Linz, Austria
来源：
APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 08期
基金：
澳大利亚研究理事会;
关键词：
CHARGE-TRANSPORT; MOBILITY; POLYMER; DENSITY; BLENDS;
D O I：
10.1063/1.3556280
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report on the charge transport properties of a simple solution processable small-molecule electron acceptor, 2-[{7-(9,9-di-n-propyl-9H-fluoren-2-yl)benzo[c][1,2,5]thiadiazol-4-yl}methylene] malononitrile (K12), designed for use in bulk-heterojunction organic photovoltaic cells. It was found that the molecular order in as-cast films can be dramatically improved by annealing at moderate temperatures (60 degrees C), which leads to a greatly enhanced electron mobility. Using the photoinduced charge extraction in linearly increasing voltage technique we measured bulk electron mobilities to be as high as 10(-4) cm(2) V-1 s(-1), comparable with some of the best nonfullerene acceptor materials reported to date. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3556280]
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页数：3
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