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Ultrathin Hole Extraction Layer for Efficient Inverted Perovskite Solar Cells
journal contribution
posted on 2018-06-13, 08:13 authored by Dianyi Liu, Qiong Wang, Mark Elinski, Pei Chen, Christopher J. Traverse, Chenchen Yang, Margaret Young, Thomas W. Hamann, Richard R. LuntInverted perovskite solar cells (PSCs)
incorporating poly(3,4-ethylenedioxythiophene)–poly(styrenesulfonate)
(PEDOT) as the hole transport/extraction layer have been broadly investigated
in recent years. However, most PSCs which incorporate PEDOT as the
hole transport layer (HTL) suffer from lower device performance stemming
from reduced photocurrent and low open-circuit voltage around 0.95
V. Here, we report an ultrathin PEDOT layer as the HTL for efficient
inverted structure PSCs. The transparency, conductivity, and resulting
film morphology were studied and compared with traditional architectures
and thicker PEDOT layers. The PSC device incorporating an ultrathin
PEDOT layer shows significant improvement in short-circuit current
density (JSC), open-circuit voltage (VOC), and power conversion efficiency. Because
ultrathin PEDOT layers can be easily obtained by dilution, this study
suggests a simple way to improve the PSC performance and provide a
route to further reduce the fabrication complexity and cost of PSCs.
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Keywords
film morphologypower conversion efficiencyPSC performanceopen-circuit voltageultrathin PEDOT layersPEDOT layers0.95 VEfficient Inverted Perovskite Solar Cells Inverted perovskitestructure PSCsultrathin PEDOT layerfabrication complexityUltrathin Hole Extraction Layerhole transport layerHTLOCdevice performancePSC device
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