Increasing photon absorption and stability of PbS quantum dot solar cells using a ZnO interlayer

被引：14
作者：
Lai, Lai-Hung [1 ]
Speirs, Mark J. [1 ]
Chang, Feng-Kuei [2 ]
Piveteau, Laura [3 ,4 ]
Kovalenko, Maksym V. [3 ,4 ]
Chen, Jen-Sue [2 ]
Wu, Jih-Jen [5 ]
Loi, Maria A. [1 ]
机构：
[1] Univ Groningen, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands
[2] Natl Cheng Kung Univ, Dept Mat Sci & Engn, Tainan 701, Taiwan
[3] ETH, Dept Chem & Appl Biosci, CH-8049 Zurich, Switzerland
[4] EMPA Swiss Fed Labs Mat Sci & Technol, CH-8600 Dubendorf, Switzerland
[5] Natl Cheng Kung Univ, Dept Chem Engn, Tainan 701, Taiwan
来源：
APPLIED PHYSICS LETTERS | 2015年 / 107卷 / 18期
关键词：
MULTIPLE EXCITON GENERATION; INFRARED REGION; EFFICIENCY; PERFORMANCE; HETEROJUNCTION; SOLIDS; FILMS;
D O I：
10.1063/1.4934946
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We compared PbS quantum dot (QD) solar cells with different cathode interlayer materials, namely, LiF and ZnO nanoparticles, using the same device structure. Solar cells fabricated with the ZnO interlayer gave a power conversion efficiency of 4.8%, which is higher (above the experimental variation) than the 4.1% efficiency obtained with a LiF interlayer. We found that the ZnO interlayer alters the spatial distribution of the optical field, leading to an increase in external quantum efficiency in the visible range. Furthermore, devices with ZnO as interlayer showed more stable performance than the ones using LiF, with practically no power conversion efficiency degradation after 1 month inside a N-2 glovebox. (C) 2015 AIP Publishing LLC.
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页数：4
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