Indoor Organic Photovoltaics: Optimal Cell Design Principles with Synergistic Parasitic Resistance and Optical Modulation Effect

Muhammad Ahsan Saeed, Sang Hyeon Kim, Hyeok Kim, Jiaen Liang, Han Young Woo, Tae Geun Kim, He Yan, Jae Won Shim

Research output: Contribution to journalReview articlepeer-review

61 Citations (Scopus)


Recently, indoor organic photovoltaics (OPVs) has attracted substantial research attention, due to the emergence of self-powered electronic devices for Internet-of-Things (IoT) applications. This progress report discusses recent developments in indoor OPVs, focusing on the strategic role of synergistic parasitic resistance in suppressing the leakage current to achieve high indoor efficiencies. Moreover, an underexplored area is presented, namely the impact of optical modulation on enhancing light absorption in indoor OPVs. First, the main advances in material design for indoor OPVs are briefly presented. This is followed by detailed discussions of the crucial strategies, including interfacial engineering, the effect of photoactive layer thickness, and the effectiveness of transparent conducting electrodes for improving the OPV performance. Overall, this review highlights that understanding the indispensable role of parasitic resistance under dim light conditions may provide new opportunities for developing efficient indoor OPVs for practical applications. Finally, after summarizing recent progress in indoor OPVs, a critical perspective is provided.

Original languageEnglish
Article number2003103
JournalAdvanced Energy Materials
Issue number27
Publication statusPublished - 2021 Jul 22

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea, funded by the Korean Government (grant numbers: 2016M1A2A2940912, 2018R1D1A1B07043759, 2019R1A6A1A11044070, and 2016R1A3B1908249). This work was also supported by the Technology Innovation Program (grant number: 20011336) funded By the Ministry of Trade, Industry & Energy (MOTIE, Korea).

Publisher Copyright:
© 2021 Wiley-VCH GmbH


  • charge transport layers
  • indoor organic photovoltaics
  • optical modulation effects
  • parasitic resistance effects
  • photoactive materials
  • transparent conducting electrodes

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science


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