Performance improvement in inverted organic solar cells by incorporating core-shell SiO 2 @Au plasmonic structures

Chengjie Zhao, Peiqian Tong, Linlin Shi, Ting Ji, Fu Rong ZHU, Yuying Hao, Yanxia Cui

Research output: Chapter in book/report/conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

Organic solar cells (OSCs) are very attractive as a clean and renewable energy technology owing to their advantages of low cost, abundant material sources, good flexibility, etc. Nevertheless, OSCs are faced with the contradictions between the optical and electrical properties. Their low absorption efficiency requires a thick active layer for efficient light harvesting, while the short carrier transport distance implies a thin active layer is necessary for efficient charge extraction. One way to solve this contradiction is to effectively enhance light absorption in the active layer without increasing the thickness. In this work, a core-shell structured plasmonic nanoparticles in the form of Au nanorod core coated with a SiO 2 shell (in short of Au NR@SiO 2 ) were introduced at the interface between the active and the cathode buffer layer of an inverted OSC based on PTB7:PC70BM active layer. By adjusting the concentration of the plasmonic nanoparticles of Au NRs@SiO 2 , we optimized the optoelectronic performances of OSCs. The results indicated when we spin-coated 1 pM Au NRs@SiO 2 on top of the buffer layer, the device performances were optimized with the short circuit current increasing significantly while the open circuit voltage bearing negligible change. Overall, the power conversion efficiency of the OSC increases from 6.52% to 7.03%, corresponding to an enhancement of 8% as compared to that of the structurally identical control cell without Au NRs@SiO 2 . The performance improvement in inverted OSCs is mainly resulted from efficient light trapping effect of the core-shell plasmonic nanoparticles.

Original languageEnglish
Title of host publication9th International Symposium on Advanced Optical Manufacturing and Testing Technologies
Subtitle of host publicationMicro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics
EditorsXiangang Luo, Mingbo Pu, Bin Fan, Reinhart Poprawe, Xiong Li, Min Gu
PublisherSPIE
ISBN (Electronic)9781510623224
DOIs
Publication statusPublished - 2019
Event9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics - Chengdu, China
Duration: 26 Jun 201829 Jun 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10840
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Micro- and Nano-Optics, Catenary Optics, and Subwavelength Electromagnetics
Country/TerritoryChina
CityChengdu
Period26/06/1829/06/18

Scopus Subject Areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

User-Defined Keywords

  • Absorption
  • Au nanorods
  • Light trapping
  • Organic solar cells
  • Plasmonic

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