Omrani MirKazem, Keshavarzi Reza, Abdi-Jalebi Mojtaba, Gao Peng
Department of Physics, University of Isfahan, 81746-73441, Isfahan, Iran.
Department of Chemistry, Catalysis Division, University of Isfahan, 81746-73441, Isfahan, Iran.
Sci Rep. 2022 Mar 30;12(1):5367. doi: 10.1038/s41598-022-09284-9.
This work utilizes a realistic electro-optical coupled simulation to study the (i) impact of mesoporous TiO removal; (ii) the embedding of Ag@SiO and SiO@Ag@SiO plasmonic nanoparticles; (iii) utilization of solution-processed inorganic p-type copper(I) thiocyanate (CuSCN) layer at the perovskite/carbon interface; and (iv) the increase of the work function of carbon electrodes (via incorporation of suitable additives/binders to the carbon ink) on the performance of carbon-based PSCs. Removal of mesoporous TiO increased the power conversion efficiency (PCE) of the device from 14.83 to 16.50% due to the increase in exciton generation rate and charge carriers' mobility in the vicinity of the perovskite-compact TiO interface. Subsequently, variable mass ratios of Ag@SiO and SiO@Ag@SiO plasmonic nanoparticles are embedded in the vicinity of the perovskite-compact TiO interface. In the optimum cases, the PCE of the devices increased to 19.72% and 18.92%, respectively, due to light trapping, scattering, and strong plasmonic fields produced by the plasmonic nanoparticles. Furthermore, adding the CuSCN layer remarkably increased the PCE of the device with a 0.93% mass ratio of Ag@SiO nanoparticles from 19.72 to 26.58% by a significant improvement of V and FF, due to the proper interfacial energy band alignment and the reduction of the recombination current density. Similar results were obtained by increasing the carbon work function, and the cell PCE was enhanced up to 26% in the optimal scenario. Our results pave the way to achieve high efficiencies in remarkably stable printable carbon-based PSCs.
（i）介孔TiO去除的影响；（ii）Ag@SiO和SiO@Ag@SiO等离子体纳米颗粒的嵌入；（iii）在钙钛矿/碳界面处使用溶液处理的无机p型硫氰酸铜（CuSCN）层；以及（iv）碳电极功函数的增加（通过向碳墨中加入合适的添加剂/粘结剂）对碳基PSC性能的影响。介孔TiO的去除使器件的功率转换效率（PCE）从14.83%提高到了16.50%，这是由于在钙钛矿-致密TiO界面附近激子产生率和电荷载流子迁移率的增加。随后，将不同质量比的Ag@SiO和SiO@Ag@SiO等离子体纳米颗粒嵌入到钙钛矿-致密TiO界面附近。在最佳情况下由于等离子体纳米颗粒产生的光捕获、散射和强等离子体场，器件的PCE分别提高到了19.72%和18.92%。此外，添加CuSCN层显著提高了器件的PCE，对于质量比为0.93%的Ag@SiO纳米颗粒，由于适当的界面能带排列和复合电流密度的降低，V和FF有显著改善，PCE从19.72%提高到了26.58%。通过提高碳功函数也得到了类似的结果，在最佳情况下电池PCE提高到了26%。我们的结果为在显著稳定的可印刷碳基PSC中实现高效率铺平了道路。
