TY - JOUR
T1 - Enhanced Near-Infrared Organic Photodetectors Leveraging Core-Shell Nanotripods
AU - Zheng, Kaiwen
AU - Deng, Baozhong
AU - Chen, Nan
AU - Chinaud-Chaix, Clemence
AU - Tréguer-Delapierre, Mona
AU - Grandidier, Bruno
AU - Bachelot, Renaud
AU - Xu, Tao
AU - Zhang, Jianhua
AU - Zhu, Furong
N1 - This work was financially supported by the Research Grants Council (GRF12302623 and 12304024), the Hong Kong Innovation and Technology Commission (GHP/121/21GD), Hong Kong Special Administrative Region, China, and Guangdong Basic and Applied Basic Research Fund (2022A1515010020), China. T.X. acknowledges funding support from the National Natural Science Foundation of China (12174244) and the Open Fund of Key Laboratory of Advanced Display and System Applications of the Ministry of Education, Shanghai University, China.
Publisher Copyright:
© 2025 The Authors. Published by American Chemical Society.
PY - 2025/6/11
Y1 - 2025/6/11
N2 - Near-infrared (NIR) photodetectors are essential for diverse applications, including medical diagnostics, optical communication, and bioimaging. Traditional photodetectors, typically made from silicon and III-V semiconductors, struggle with large-area devices on precured or flexible substrates due to complex manufacturing and high costs. Organic photodetectors (OPDs), however, offer cost-effectiveness, flexibility, and a customizable spectral response. In this study, we report our effort to enhance NIR absorption in OPDs by incorporating core-shell structured PdCu@Au@SiO2 nanotripods (NTs) with a D3h configuration, designed for localized surface plasmon resonance (LSPR) beyond 1000 nm. Integrating these NTs into the OPD active layer significantly boosts NIR absorption, achieving a responsivity of 0.46 A/W and a dynamic range of 145 dB at 1050 nm. NT-based OPDs show superior sensitivity over the control OPD and a silicon photodetector at wavelengths of over 1000 nm. This improvement is due to the synergistic effects of LSPR and omnidirectional scattering from the PdCu@Au@SiO2 NTs, enhancing carrier generation and extraction. The improved performance highlights their potential for advanced applications such as long-range photoplethysmography and visual line-of-sight communication systems.
AB - Near-infrared (NIR) photodetectors are essential for diverse applications, including medical diagnostics, optical communication, and bioimaging. Traditional photodetectors, typically made from silicon and III-V semiconductors, struggle with large-area devices on precured or flexible substrates due to complex manufacturing and high costs. Organic photodetectors (OPDs), however, offer cost-effectiveness, flexibility, and a customizable spectral response. In this study, we report our effort to enhance NIR absorption in OPDs by incorporating core-shell structured PdCu@Au@SiO2 nanotripods (NTs) with a D3h configuration, designed for localized surface plasmon resonance (LSPR) beyond 1000 nm. Integrating these NTs into the OPD active layer significantly boosts NIR absorption, achieving a responsivity of 0.46 A/W and a dynamic range of 145 dB at 1050 nm. NT-based OPDs show superior sensitivity over the control OPD and a silicon photodetector at wavelengths of over 1000 nm. This improvement is due to the synergistic effects of LSPR and omnidirectional scattering from the PdCu@Au@SiO2 NTs, enhancing carrier generation and extraction. The improved performance highlights their potential for advanced applications such as long-range photoplethysmography and visual line-of-sight communication systems.
KW - core−shell nanotripods
KW - enhanced NIR absorption
KW - LSPR
KW - NIR photodetectors
KW - organic photodetectors
UR - http://www.scopus.com/inward/record.url?scp=105007497077&partnerID=8YFLogxK
U2 - 10.1021/acsami.5c02476
DO - 10.1021/acsami.5c02476
M3 - Journal article
AN - SCOPUS:105007497077
SN - 1944-8244
VL - 17
SP - 34304
EP - 34316
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 23
ER -
