High-Performance Organic Energy-Harvesting Devices and Modules for Self-Sustainable Power Generation under Ambient Indoor Lighting Environments

Ryota Arai, Seiichi Furukawa, Yu Hidaka, Hideaki Komiyama, Takuma Yasuda

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Organic photovoltaics (OPVs) that perform more efficiently under artificial indoor lighting conditions than they do under sunlight are attracting growing interest as they can potentially serve as ambient energy harvesters for powering low-power electronics and portable devices for the Internet of Things. Herein, solution-processed small-molecule OPVs are demonstrated to exhibit high power conversion efficiencies exceeding 16% under white LED illumination, delivering high output power densities of up to 12.4 and 65.3 μW cm -2 at 200 and 1000 lx, respectively. Increasing the open-circuit voltage (V oc ) of OPVs is a critical factor for achieving higher indoor photovoltaic performance. Toward real applications, this small-molecule OPV system is adopted to fabricate six series-connected modules with an active area of ∼10 cm 2 that are capable of generating a high output power surpassing 100 μW and a high V oc of over 4.2 V even under dimly lit indoor conditions of 200 lx. These results indicate that OPVs are promising as indoor electric power sources for self-sustainable electronic devices.

Original languageEnglish
Pages (from-to)9259-9264
Number of pages6
JournalACS Applied Materials and Interfaces
Volume11
Issue number9
DOIs
Publication statusPublished - Mar 6 2019

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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