Organic photodiode with dual functions of indoor photovoltaic and high-speed photodetector

Tae Wook Kim; Sung Hyun Kim; Jae Won Shim; Do Kyung Hwang

doi:10.1007/s12200-022-00024-5

Organic photodiode with dual functions of indoor photovoltaic and high-speed photodetector

Front Optoelectron. 2022 Apr 28;15(1):18. doi: 10.1007/s12200-022-00024-5.

Authors

Tae Wook Kim^#^{1

2}, Sung Hyun Kim^#², Jae Won Shim³, Do Kyung Hwang^{4

5}

Affiliations

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 School of Electrical Engineering, Korea University, Seoul, 02841, Republic of Korea. jwshim19@korea.ac.kr.
⁴ Center of Opto-Electronic Materials and Devices, Post-Silicon Semiconductor Institute, Korea Institute of Science and Technology (KIST), Seoul, 02792, Republic of Korea. dkhwang@kist.re.kr.
⁵ Division of Nano & Information Technology, KIST School, University of Science and Technology (UST), Seoul, 02792, Republic of Korea. dkhwang@kist.re.kr.

^# Contributed equally.

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.

Keywords: Indoor photovoltaics; Organic semiconductor; Photodetector; Photodiode.

Publication types

Letter