Photo-induced electron transfer reactions at semiconductor quantum dot interfaces

Aisea Veamatahau; Jiang Bo; Satoshi Makuta; Khor Chong Yaw; Masayuki Kanehara; Toshiharu Teranishi; Yasuhiro Tachibana

doi:10.1117/12.892428

19 September 2011 Photo-induced electron transfer reactions at semiconductor quantum dot interfaces

Aisea Veamatahau, Jiang Bo, Satoshi Makuta, Khor Chong Yaw, Masayuki Kanehara, Toshiharu Teranishi, Yasuhiro Tachibana

Proceedings Volume 8109, Solar Hydrogen and Nanotechnology VI; 81090N (2011) https://doi.org/10.1117/12.892428
Event: SPIE Solar Energy + Technology, 2011, San Diego, California, United States

Abstract

Cadmium sulfide (CdS) quantum dots with a series of electron donor and acceptors were employed to investigate thermodynamic and kinetic influences on photo-induced electron transfer reactions at CdS surface. Although the potential energy levels of all electron donor and acceptors are located within the QD band gap, the QD photoluminescence (PL) behavior is dependent upon the type of quencher. PL decreased into half, when one methyl viologen or benzyl viologen molecule per one QD was added into the QD solution, implying that the molecule attaches to the QD surface. In contrast, the dynamic quenching behavior was observed when thionine or o-tolidine was employed as a quencher. PL quenching efficiency decreased, when the distance between the QD surface and the quencher was increased by capping the QD with butylamine. Therefore, the PL quenching is mainly controlled kinetically rather than thermodynamically.

Citation Download Citation

Aisea Veamatahau, Jiang Bo, Satoshi Makuta, Khor Chong Yaw, Masayuki Kanehara, Toshiharu Teranishi, and Yasuhiro Tachibana "Photo-induced electron transfer reactions at semiconductor quantum dot interfaces", Proc. SPIE 8109, Solar Hydrogen and Nanotechnology VI, 81090N (19 September 2011); https://doi.org/10.1117/12.892428

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