(Sm/Eu/Tm)^(3+) doped tantalum semiconductor system for photovoltaic and electrochemical functionality amplification  

作　　者：Shaan Bibi Jaffri Khuram Shahzad Ahmad Isaac Abrahams Ibrahim A.A 

机构地区：[1]Materials and Environmental Chemistry Lab,Lab-E21,Department of Environmental Sciences,Fatima Jinnah Women University,Rawalpindi,Pakistan [2]School of Physical and Chemical Sciences,Queen Mary University of London,London,United Kingdom [3]Department of Botany and Microbiology,College of Science,King Saud University,P.O.Box 2455,Riyadh,11451,Saudi Arabia

出　　处：《Journal of Rare Earths》2024年第8期1586-1594,I0007,共10页稀土学报（英文版）

基　　金：supported by Researchers Supporting Project number RSP2023R176,King Saud University,Riyadh,Saudi Arabia。

摘　　要：This work reports the synthesis,characterization,and energy focused applications of the novel lanthanides co-doped tantalum pentoxide hetero-system(Sm^(3+)-Eu^(3+)-Tm^(3+):Ta_(2)O_(5)).Ln^(3+)-doped Ta_(2)O_(5) express excellent opto-electronic features reflected by the narrow band gap energy of 3.87 eV.Different vibrations confirm the presence of Ta-O-Ta and Ta-O bonds.The synthesized system possesses orthorhombic geometry with 59.46 nm particle size.With the smoother and compact morphology,the synthesized material succeeds in augmenting the performance of different systems aimed at energy applications.Fully ambient perovskite solar cell device fabricated with the Ln^(3+)-doped Ta_(2)O_(5) as an electron transport layer excels in achieving an efficiency and fill factor of 14.17% and 76% under artificial sun.This device was marked by the negligible hysteresis behavior showing profound photovoltaic performance.The electrochemical activity of the Ln^(3+)-doped Ta_(2)O_(5) decorated electrode was evaluated for electrical charge storage potential with pseudocapacitive behavior,With the highest specific capacitance of 355.39 F/g and quicker ionic diffusion rate,the designed electrode excels conventionally used materials.Electro-catalysis of water with Ln^(3+)-doped Ta_(2)O_(5) material indicates its capacity for H_(2) production with the lowest overpotential and Tafel slope values of 148 and 121.2 mV/dec,while the O_(2) generation is comparatively lower.With the stable electrochemical output,this rare earth modified material has the potential to replace conventionally used environmentally perilous and costly materials.

关 键 词：Lanthanide doping Rare earth materials Perovskite solar cells SUPERCAPACITORS Water splitting 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TQ135.13[化学工程—无机化工]