Easy-to-fabricate high efficiency silicon nanowires solar cell modified by CdTe and zinc tetraphenyl porphyrin nanostructures

作     者：Debanjan Maity Saurabh Kumar Pathak Melepurath Deepa Debanjan Maity;Saurabh Kumar Pathak;Melepurath Deepa

作者机构：Department of ChemistryIndian Institute of Technology HyderabadKandiSangareddyTelangana 502284India 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2021年第30卷第12期

页      面：484-497,I0012页

核心收录：

学科分类：0820[工学-石油与天然气工程] 07[理学] 08[工学] 070205[理学-凝聚态物理] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0702[理学-物理学] 

基　　金：Financial support from the Ministry of Education-Scheme for Transformational and Advanced Research in Sciences (Mo ESTARS  Grant number:STARS/APR2019/CS/375) India。 

主　　题：Silicon Nanowires Porphyrin Solar cell Hole transfer 

摘      要：Liquid junction solar cell(LJSC) with vertically silicon nanowires(SiNWs) as the primary photosensitizer,co-sensitized with luminescent and narrow gap CdTe nanoparticles,and cuboidal microstructures of zinc tetraphenyl porphyrin(ZnTPP) dye offers broad and intense visible light absorption that translates into a maximum power conversion efficiency(PCE) of 9.09%,when combined with a polymeric gel of a I_(2)/I^(-)redox couple as the hole transport material and a counter electrode(CE) of poly(3,4-ethyelenedioxythio phene) doped with imide ions(PEDOT-N(CF_(3) SO_(2))_(2)),under 1 sun irradiance.The p-type CdTe efficiently scavenges holes from SiNWs and simultaneously allows the passage of photoexcited electrons from ZnTPP to SiNWs via electrical conduction thus imparting an enhanced solar cell performance.Cosensitization also supresses back electron transfer effectively,as is inferred from a ~68% enhancement in PCE compared to SiNWs alone.Optimization of the CE entailed the evaluation of the effect of dopant anion:imide versus dicyanamide in PEDOT,and revealed that the presence of macro-cracks in the polymer surface,a deeper work function,and a lower electrical conductance are the shortcomings of the dicyanamide doped PEDOT and reduce the overall PCE,compared to imide.This study brings out how by judicious choice of photoanode and CE components,efficient,stable and easy-to-assemble LJSCs can be developed.