Colloidal Quantum Dot Photodiodes with Ligand-dependable and Photolithographic Patterning Technique | Zendy

ShinYoung Jeonga | Zendy; SoonKyu Cha | Zendy; Il Ki Han | Zendy

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Colloidal Quantum Dot Photodiodes with Ligand-dependable and Photolithographic Patterning Technique

Author(s) -

ShinYoung Jeonga,

SoonKyu Cha,

Il Ki Han

Publication year - 2019

Publication title -

applied science and convergence technology

Language(s) - English

Resource type - Journals

eISSN - 2288-6559

pISSN - 1225-8822

DOI - 10.5757/asct.2019.28.3.55

Subject(s) - quantum dot , photodiode , colloid , nanotechnology , optoelectronics , ligand (biochemistry) , chemistry , materials science , biochemistry , receptor

We patterned a quantum dot (QD) layer via photolithography and fabricated a QD photodiode using an inverted QD-light emitting diode (LED) structure. It shows behavior similar to normal photodiodes in terms of photoresponse. However, the dark current was reduced by 1/10 and the photocurrent increased 10 times in comparison with unpatterned QD photodiodes. This study is beneficial for creating multicolor QD sensors and simultaneously integrating LEDs and photosensors on the same structure. It means that the sensor works while blinking time of LED and it could be applied to advanced display technique.

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