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Miniaturized VIS‐NIR Spectrometers Based on Narrowband and Tunable Transmission Cavity Organic Photodetectors with Ultrahigh Specific Detectivity above 10 14 Jones

Authors :
Yazhong Wang
Karl Leo
Koen Vandewal
Jonas Kublitski
Johannes Benduhn
Shen Xing
Vasileios C. Nikolis
Xiangkun Jia
Hans Kleemann
Erjuan Guo
Donato Spoltore
Spoltore, Donato/0000-0002-2922-9293
Shen/0000-0002-0637-3962
Kublitski, Jonas/0000-0003-0558-9152
Xing, Shen
Nikolis, Vasileios Christos
Kublitski, Jonas
Guo, Erjuan
Jia, Xiangkun
Wang, Yazhong
SPOLTORE, Donato
VANDEWAL, Koen
Kleemann, Hans
Benduhn, Johannes
Leo, Karl
Source :
Advanced Materials. 33:2102967
Publication Year :
2021
Publisher :
Wiley, 2021.

Abstract

Spectroscopic photodetection plays a key role in many emerging applications such as context-aware optical sensing, wearable biometric monitoring, and biomedical imaging. Photodetectors based on organic semiconductors open many new possibilities in this field. However, ease of processing, tailorable optoelectronic properties, and sensitivity for faint light are still significant challenges. Here, the authors report a novel concept for a tunable spectral detector by combining an innovative transmission cavity structure with organic absorbers to yield narrowband organic photodetection in the wavelength range of 400-1100 nm, fabricated in a full-vacuum process. Benefiting from this strategy, one of the best performed narrowband organic photodetectors is achieved with a finely wavelength-selective photoresponse (full-width-at-half-maximum of approximate to 40 nm), ultrahigh specific detectivity above 10(14) Jones, the maximum response speed of 555 kHz, and a large dynamic range up to 168 dB. Particularly, an array of transmission cavity organic photodetectors is monolithically integrated on a small substrate to showcase a miniaturized spectrometer application, and a true proof-of-concept transmission spectrum measurement is successfully demonstrated. The excellent performance, the simple device fabrication as well as the possibility of high integration of this new concept challenge state-of-the-art low-noise silicon photodetectors and will mature the spectroscopic photodetection into technological realities. China Scholarship CouncilChina Scholarship Council [201706070125, 201706890003, 201706140127]; DFGGerman Research Foundation (DFG)European Commission [VA 1035/5-1]; Sachsische Aufbaubank [100325708]

Details

ISSN :
15214095 and 09359648
Volume :
33
Database :
OpenAIRE
Journal :
Advanced Materials
Accession number :
edsair.doi.dedup.....65185ada99b23e9adc5a5820280af5a1
Full Text :
https://doi.org/10.1002/adma.202102967