Voltage-tunable portable power supplies based on tailored integration of modularized silicon photovoltaics and printed bipolar lithium-ion batteries

Jung Hui Kim, Inchan Hwang, Se Hee Kim, Jeonghwan Park, Wonjoo Jin, Kwanyong Seo, Sang Young Lee

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Coupling solar cells with energy storage devices promises to overcome issues associated with intermittency and longevity of the individual systems. Despite such significance of the coupled power sources, most previous approaches have involved bulky configurations with inactive components, eventually hindering their application as portable power sources. Furthermore, to enable practical/versatile applications of the coupled power sources, their operating voltages should be widened and customized for a specific purpose. Here, we demonstrate voltage-tunable portable power supplies based on tailored integration of interdigitated-back-contact-structured crystalline-silicon photovoltaics (cSiPV) and printed bipolar quasi-solid-state lithium-ion batteries (bQSSBs). The maximum power voltages of the cSiPVs and end-of-charge voltages of the bQSSBs are respectively varied and mutually matched to widen the operating voltage window (2.7-13.5 V) of cSiPV-bQSSB. The resulting cSiPV-bQSSB achieves high overall efficiency (10.2%) and stable photo-rechargeable cyclability. Moreover, cSiPV-bQSSB featuring a customized operating voltage is seamlessly unitized with various electronic devices and exhibits sustainable long-time operation under variable weather conditions.

Original languageEnglish
Pages (from-to)16291-16301
Number of pages11
JournalJournal of Materials Chemistry A
Issue number32
Publication statusPublished - 2020 Aug 28

Bibliographical note

Funding Information:
This work was supported by the Basic Science Research Program (2017M1A2A2087812, 2019R1A2C2086602, and 2018R1A2A1A05019733), and Wearable Platform Materials Technology Center (2016R1A5A1009926) through the National Research Foundation of Korea (NRF) grant by the Korean Government (MSIT). This work was also supported by the New Renewable Energy Core Technology Development Project of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) granted nancial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20183010013900).

Publisher Copyright:
© The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)


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