title: In situ processed gold nanoparticle-embedded TiO2 nanofibers enabling plasmonic perovskite solar cells to exceed 14% conversion efficiency.
abstract: We have demonstrated organometallic perovskite solar cells (PSCs) based on Au decorated TiO2 nanofibers and methylammonium lead iodide (MAPbI3). A power conversion efficiency of 14.92% was achieved, which is significantly higher than that of conventional mesoporous (mp) TiO2, as well as TiO2 nanofiber-based devices. The present synthetic process provides new opportunities for the development of efficient plasmonic PSCs based on metal oxide nanofibers. Solar cells based on these architectures exhibit a short-circuit current density J(SC) of 21.63 ± 0.36 mA cm(-2), V(OC) of 0.986 ± 0.01 V and fill factor of 70% ± 3%, which provide a power conversion efficiency of 14.92% ± 0.33% under standard AM 1.5 conditions. The results of time-resolved photoluminescence (TRPL) spectroscopy and solid-state impedance spectroscopy (ssIS) revealed that PSCs based on Au-decorated TiO2 nanofibers exhibit a low recombination rate. The present results are much higher than those for reported PSCs based on a Au@TiO2 electron-transporting layer (ETL).
authors.affiliation: Polymer Energy Materials Laboratory, School of Applied Chemical Engineering, Chonnam National University, Gwangju 500-757, South Korea. hongck@chonnam.ac.kr sawantasolar@gmail.com.
authors.forename: Sawanta S
authors.initials: SS
authors.lastname: Mali
authors.affiliation: Polymer Energy Materials Laboratory, School of Applied Chemical Engineering, Chonnam National University, Gwangju 500-757, South Korea. hongck@chonnam.ac.kr sawantasolar@gmail.com.
authors.forename: Chang Su
authors.initials: CS
authors.lastname: Shim
authors.affiliation: Polymer Energy Materials Laboratory, School of Applied Chemical Engineering, Chonnam National University, Gwangju 500-757, South Korea. hongck@chonnam.ac.kr sawantasolar@gmail.com.
authors.forename: Hyungjin
authors.initials: H
authors.lastname: Kim
authors.affiliation: Thin Film Materials Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, M. S., India.
authors.forename: Pramod S
authors.initials: PS
authors.lastname: Patil
authors.affiliation: Polymer Energy Materials Laboratory, School of Applied Chemical Engineering, Chonnam National University, Gwangju 500-757, South Korea. hongck@chonnam.ac.kr sawantasolar@gmail.com.
authors.forename: Chang Kook
authors.initials: CK
authors.lastname: Hong