Efficient polymer:fullerene bulk heterojunction solar cells with n-type doped titanium oxide as an electron transport layer

被引：0
|
作者：
Choi, Youna [1 ]
Kim, Geunjin [2 ]
Kim, Heejoo [1 ]
Kim, Sun Hee [2 ]
Lee, Kwanghee [1 ,2 ]
机构：
[1] Heeger Center for Advanced Material, Research Institute of Solar and Sustainable Energies, Gwangju Institute of Science and Technology, Gwangju,500-712, Korea, Republic of
[2] School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju,500-712, Korea, Republic of
来源：
Thin Solid Films | 2015年 / 583卷
基金：
新加坡国家研究基金会;
关键词：
Electron transport properties - Polymer solar cells - Electronegativity - Metal ions - Chemical bonds - Fullerenes - Heterojunctions - Niobium oxide - Titanium oxides;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Abstract We have reported a highly n-type doped solution-processed titanium metal oxide (TiOx) for use as an efficient electron-transport layer (ETL) in polymer:fullerene bulk heterojunction (BHJ) solar cells. When the metal ions (Ti) in TiOx are partially substituted by niobium (Nb), the charge carrier density increased, by an order of magnitude, because of the large electronegativity of Nb compared to that of Ti. Therefore, the work function (WF) of Nb-doped metal oxide (Nb-TiOx) decreases from 4.75 eV (TiOx) to 4.66 eV (Nb-TiOx), leading to an enhancement in the power conversion efficiency (PCE) of BHJ solar cells with a Nb-TiOx ETL (from 7.99% to 8.40%). © 2015 Elsevier B.V.
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页码：86 / 90
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