Near-infrared photodetectors based on PbS colloidal quantum dots

A. De Iacovo; L. Colace; L. Scopa; S. Foglia

doi:10.1117/12.2224958

29 April 2016 Near-infrared photodetectors based on PbS colloidal quantum dots

A. De Iacovo, L. Colace, L. Scopa, S. Foglia

Proceedings Volume 9899, Optical Sensing and Detection IV; 989908 (2016) https://doi.org/10.1117/12.2224958
Event: SPIE Photonics Europe, 2016, Brussels, Belgium

Abstract

Colloidal Quantum Dots (CQD), due to their extremely large optical absorption coefficient and tunability of the absorption bands, are very promising for the realization of photodetectors. PbS quantum dots, in particular, can be effectively employed as a material for near infrared photodetectors with sensitivity peaks ranging from 1 to 2μm. CQD photodetectors, nevertheless, present still many unsolved issues when it comes to fast detection and noise performance. Thanks to the recent advances in CQD material synthesis and treatment, photodetectors achieved unprecedented performance but the aforementioned issues could still not be fully addressed. Concerning photodetectors, however, material quality is only the starting point for the realization of performing devices: CQD technology came to the point where an engineering approach is needed in order to fully comprehend the behavior of the photodetectors, to define proper strategies for the enhancement of their performance and introduce them in practical applications. In this work we analyze the optical and electrical characteristics of PbS CQD near infrared photodetectors fabricated on SiO₂ substrate and demonstrate how even a simple, fully passive readout circuit topology could be employed in order to obtain a dramatic enhancement of the characteristics of the devices.

Citation Download Citation

A. De Iacovo, L. Colace, L. Scopa, and S. Foglia "Near-infrared photodetectors based on PbS colloidal quantum dots", Proc. SPIE 9899, Optical Sensing and Detection IV, 989908 (29 April 2016); https://doi.org/10.1117/12.2224958

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available