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Ultra-Thin GaAs Single-Junction Solar Cells for Self-Powered Skin-Compatible Electrocardiogram Sensors.
Nam, Yonghyun; Shin, Dongjoon; Choi, Jun-Gyu; Lee, Inho; Moon, Sunghyun; Yun, Yeojun; Lee, Won-June; Park, Ikmo; Park, Sungjun; Lee, Jaejin.
Afiliación
  • Nam Y; Department of Electrical and Computer Engineering, Ajou University, Suwon, 16499, Republic of Korea.
  • Shin D; Department of Intelligence Semiconductor and Engineering, Ajou University, Suwon, 16499, Republic of Korea.
  • Choi JG; Department of Electrical and Computer Engineering, Ajou University, Suwon, 16499, Republic of Korea.
  • Lee I; Department of Intelligence Semiconductor and Engineering, Ajou University, Suwon, 16499, Republic of Korea.
  • Moon S; Department of Electrical and Computer Engineering, Ajou University, Suwon, 16499, Republic of Korea.
  • Yun Y; Department of Electrical and Computer Engineering, Ajou University, Suwon, 16499, Republic of Korea.
  • Lee WJ; Department of Chemistry, Purdue University, West Lafayette, IN, 47907, USA.
  • Park I; Department of Electrical and Computer Engineering, Ajou University, Suwon, 16499, Republic of Korea.
  • Park S; Department of Electrical and Computer Engineering, Ajou University, Suwon, 16499, Republic of Korea.
  • Lee J; Department of Intelligence Semiconductor and Engineering, Ajou University, Suwon, 16499, Republic of Korea.
Small Methods ; 8(10): e2301735, 2024 Oct.
Article en En | MEDLINE | ID: mdl-38529746
ABSTRACT
GaAs thin-film solar cells have high efficiency, reliability, and operational stability, making them a promising solution for self-powered skin-conformal biosensors. However, inherent device thickness limits suitability for such applications, making them uncomfortable and unreliable in flexural environments. Therefore, reducing the flexural rigidity becomes crucial for integration with skin-compatible electronic devices. Herein, this study demonstrated a novel one-step surface modification bonding methodology, allowing a streamlined transfer process of ultra-thin (2.3 µm thick) GaAs solar cells on flexible polymer substrates. This reproducible technique enables strong bonding between dissimilar materials (GaAs-polydimethylsiloxane, PDMS) without high external pressures and temperatures. The fabricated solar cell showed exceptional performance with an open-circuit voltage of 1.018 V, short-circuit current density of 20.641 mA cm-2, fill factor of 79.83%, and power conversion efficiency of 16.77%. To prove the concept, the solar cell is integrated with a skin-compatible organic electrochemical transistor (OECT). Competitive electrical outputs of GaAs solar cells enabled high current levels of OECT under subtle light intensities lower than 50 mW cm-2, which demonstrates a self-powered electrocardiogram sensor with low noise (signal-to-noise ratio of 32.68 dB). Overall, this study presents a promising solution for the development of free-form and comfortable device structures that can continuously power wearable devices and biosensors.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Small Methods Año: 2024 Tipo del documento: Article Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Small Methods Año: 2024 Tipo del documento: Article Pais de publicación: Alemania