Enhanced Efficiency of Carbon-Based Mesoscopic Perovskite Solar Cells through a Tungsten Oxide Nanoparticle Additive in the Carbon Electrode.

ABSTRACT: 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.

SUBMITTER: Zhou L 

PROVIDER: S-EPMC6584654 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature