Reduced interface energy loss in non-fullerene organic solar cells using room temperature-synthesized SnO2 quantum dots  

作　　者：In Su Jin Minwoo Park Jae Woong Jung 

机构地区：[1]Department of Advanced Materials Engineering for Information&Electronics,Kyung Hee University,1732 Deogyeong-daero,Giheung-gu,Yongin-si,Gyeonggi-do 446-701,Republic of Korea [2]Department of Chemical and Biological Engineering,Sookmyung Women's University,Seoul 04310,Republic of Korea

出　　处：《Journal of Materials Science & Technology》2020年第17期12-19,共8页材料科学技术（英文版）

基　　金：supported by Korea Electric Power Corporation.(Grant number:R17XA05-11);supported by the Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Science,ICT&Future Planning(Grant number:2017R1C1B2009691)。

摘　　要：We herein report the room temperature synthesis of colloidal SnO2 quantum dots and their application in non-fullerene organic solar cells as an excellent electron transport layer.The thiourea-assisted hydrolysis at room temperature affords the nanocrystalline SnO2 quantum dots with a diameter of 3-4 nm.The utilization of the SnO2 quantum dots as an electron transporting layer effectively reduces the interfacial trap density and charge recombination in the solar cell devices,leading to not only the reduced energy loss but also excellent photocurrent generation.The optimized organic solar cells employing SnO2 quantum dots with polyethylenimine ethoxylated achieves power conversion efficiencies up to 12.023%with a VOC,a JSC,and a FF of 0.89 V,18.89 mA cm^–2,and 0.72.This work suggest that the SnO2 quantum dot is a promising electron transporting material to construct efficient organic solar cells for practical applications.This work also demonstrates the key strategy for thiourea-assisted hydrolysis to synthesize fine and nanocrystalline SnO2 quantum dots.

关 键 词：Energy loss Organic solar cells INTERFACE SNO2 Quantum dots 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TM911.4[电气工程—电力电子与电力传动]