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Organic photodiode with dual functions of indoor photovoltaic and high-speed photodetector |
Tae Wook Kim1,2, Sung Hyun Kim2, Jae Won Shim2(), Do Kyung Hwang1,3() |
1. Center of Opto-Electronic Materials and Devices, Post-Silicon Semiconductor Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea 2. School of Electrical Engineering, Korea University, Seoul 02841, Republic of Korea 3. Division of Nano & Information Technology, KIST School, University of Science and Technology (UST), Seoul 02792, Republic of Korea 4. Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Fuzhou 350207, China |
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Abstract Energy harvesting and light detection are key technologies in various emerging optoelectronic applications. The high absorption capability and bandgap tunability of organic semiconductors make them promising candidates for such applications. Herein, a poly(3-hexylthiophene-2,5-diyl) (P3HT):indene-C60 bisadduct (ICBA) bulk heterojunction-based organic photodiode (OPD) was reported, demonstrating dual functionality as an indoor photovoltaic (PV) and as a high-speed photodetector. This OPD demonstrated decent indoor PV performance with a power conversion efficiency (PCE) of (11.6 ± 0.5)% under a light emitting diode (LED) lamp with a luminance of 1000 lx. As a photodetector, this device exhibited a decent photoresponsivity of 0.15 A/W (green light) with an excellent linear dynamic range (LDR) of over 127 dB within the optical power range of 3.74 × 10-7 to 9.6 × 10-2 W/cm2. Furthermore, fast photoswitching behaviors could be observed with the rising/falling times of 14.5/10.4 µs and a cutoff (3 dB) frequency of 37 kHz. These results might pave the way for further development of organic optoelectronic applications.
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Keywords
Organic semiconductor
Photodiode
Indoor photovoltaics
Photodetector
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Corresponding Author(s):
Jae Won Shim,Do Kyung Hwang
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Issue Date: 19 May 2022
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