High performance organic ultraviolet photodetectors based on m-MTDATA

Zhongli Zhao; Xiaofeng Bai; Yubin Shang; Jikai Yang; Baozeng Li; De Song

doi:10.1117/12.2309749

20 February 2018 High performance organic ultraviolet photodetectors based on m-MTDATA

Zhongli Zhao, Xiaofeng Bai , Yubin Shang, Jikai Yang, Baozeng Li, De Song

Proceedings Volume 10697, Fourth Seminar on Novel Optoelectronic Detection Technology and Application; 106970U (2018) https://doi.org/10.1117/12.2309749
Event: Fourth Seminar on Novel Optoelectronic Detection Technology and Application, 2017, Nanjing, China

Abstract

We demonstrate highly efficient organic ultraviolet photodetectors using 4,4’,4’’ -tris[3-methyl-pheny(phenyl) amino] triphenylamine (m-MTDATA) and aluminum Tris(8-Hydroxyquinolinate) Synonym Alq₃). The optimized photodetector delivers a photocurrent of 1.40 mA/cm² at10 V, corresponding to a response of 127 mA/W under an illumination of 375 nm UV light irradiation with an intensity of 10.5 mW/cm² and a detectivity of 2.15×10¹¹ cm Hz^1/2 /W. The high response is attributed to the larger band offset at m-MTDATA/ Alq₃ heterojunction, the suppression of radiative decay of m-MTDATA and efficient electron transfer from m-MTDATA to Alq3. The working mechanism of harvesting high performance is also discussed in detail.

Citation Download Citation

Zhongli Zhao, Xiaofeng Bai , Yubin Shang, Jikai Yang, Baozeng Li, and De Song "High performance organic ultraviolet photodetectors based on m-MTDATA", Proc. SPIE 10697, Fourth Seminar on Novel Optoelectronic Detection Technology and Application, 106970U (20 February 2018); https://doi.org/10.1117/12.2309749

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