Germinant ZnO nanorods as a charge-selective layer in organic solar cells
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2020年第20期
论文作者：Kunsik An Jaehoon Kim Mohammad Afsar Uddin Seunghyun Rhee Hyeok Kim Kyung-Tae Kang Han Young Woo Changhee Lee
文章页码：89 - 94
摘 要：A facile method was introduced and demonstrated to synthesize zinc oxide（ZnO） nanorods（NRs） as an electron transporting layer（ETL） for organic solar cells（OSCs）.Hydrothermal synthesis of the NRs showed a constant growth rate of 5.5 nm min-1 from germination to sub-micrometer length.The properties were characterized using scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,absorption spectrophotometry and so on.Based on these measurements,the germinant growth mechanism and its corresponding orientation characteristics were investigated.As an ETL of the OSCs,ZnO NRs enhance the charge extraction from the active layer due to their increased interfacial surface area,but there is an optimal length because of the shunt path formation and UV absorption of long ZnO NRs.As a re sult,the OSC with the ZnO NRs as ETL shows power conversion efficiency（PCE） up to 6.2%.The J-V characteristics and incident photon-to-current conversion efficiency（IPCE） measurement also reveal that the efficiency enhancement is an assembly of individual results from optical,physical and electrical characteristic of the ZnO NRs.
Kunsik An1,2，Jaehoon Kim1，Mohammad Afsar Uddin3，Seunghyun Rhee1，Hyeok Kim4，Kyung-Tae Kang2，Han Young Woo3，Changhee Lee1
1. Department of Electrical and Computer Engineering, Seoul National University2. Micro/Nano Process Group, Korea Institute of Industrial Technology (KITECH)3. Department of Chemistry, College of Science, Korea University4. Department of Electrical Engineering, Engineering Research Institute (ERI), Gyeongsang National University
摘 要：A facile method was introduced and demonstrated to synthesize zinc oxide（ZnO） nanorods（NRs） as an electron transporting layer（ETL） for organic solar cells（OSCs）.Hydrothermal synthesis of the NRs showed a constant growth rate of 5.5 nm min-1 from germination to sub-micrometer length.The properties were characterized using scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,absorption spectrophotometry and so on.Based on these measurements,the germinant growth mechanism and its corresponding orientation characteristics were investigated.As an ETL of the OSCs,ZnO NRs enhance the charge extraction from the active layer due to their increased interfacial surface area,but there is an optimal length because of the shunt path formation and UV absorption of long ZnO NRs.As a re sult,the OSC with the ZnO NRs as ETL shows power conversion efficiency（PCE） up to 6.2%.The J-V characteristics and incident photon-to-current conversion efficiency（IPCE） measurement also reveal that the efficiency enhancement is an assembly of individual results from optical,physical and electrical characteristic of the ZnO NRs.
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