Journal
SCIENTIFIC REPORTS
Volume 9, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-019-45374-x
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Funding
- National Key Research and Development Program of China [2017YFF0104803]
- National Natural Science Foundation [61875186, 61435013, 61675195, 61674140]
- Beijing Science and Technology Commission [Z151100003315019]
- Beijing Natural Science Foundation [4162063]
- Key Research Program of Frontier Sciences, CAS [QYZDY-SSW-JSC022]
- Youth Innovation Promotion Association, CAS [2015091]
- British Council Newton Fund
- China Scholarship Council [201703780095]
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This paper presents perovskite solar cells employed with WO3 nanoparticles embedded carbon top electrode. WO3 nanoparticles works as an inorganic hole-transport material (HTM) to promote the hole-extraction in the perovskite/carbon interface as revealed by efficiency, electrochemical impedance and external quantum efficiency measurements. As a result, a 40% enhancement of energy conversion efficiency has been achieved compared to the reference devices with the energy conversion efficiency of 10.77% under standard conditions. In addition, the Li-TFSI can modify the interface between electron-transport material (ETM) and perovskite, which may inhibit the recombination at the ETM/perovskite interface. The V-oc of devices upon the modification of Li-TFSI is increased from 887.9 to 934.2 mV. This work highlights about the enlightenment of the effective performance of carbon-based mesoscopic PSCs by the introduction of HTM and the modification of interfaces.
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