Semiconductor nanocrystals photosensitize C60 crystals.
Semiconductor nanocrystals (SCNCs) made of CdSe, CdTe, and InP are used to photosensitize needlelike C(60) crystals. The photocurrent is increased by up to 3 orders of magnitude as compared with C(60) crystals without SCNCs. The photocurrent spectrum can be tuned precisely by the SCNC size and material, rendering the SCNC-functionalized C(60) crystals an excellent material for spectrally tuneable photodetectors. We explain the increased photocurrent as a result of photoexcited electrons transferring from the SCNCs to the C(60) crystals and causing photoconductivity, while the complementary holes remain trapped in the SCNCs.
Biebersdorf
Andreas
A
Photonics and Optoelectronics Group, Physics Department and CeNS, Ludwig-Maximilians-Universität München, Germany.
Dietmüller
Roland
R
Susha
Andrei S
AS
Rogach
Andrey L
AL
Poznyak
Sergey K
SK
Talapin
Dmitri V
DV
Weller
Horst
H
Klar
Thomas A
TA
Feldmann
Jochen
J
D019187:Cadmium Compounds / Q000737:chemistry; D037741:Fullerenes / Q000737:chemistry*; D007204:Indium / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry*; D010720:Phosphines / Q000737:chemistry; D010777:Photochemistry; D018036:Selenium Compounds / Q000737:chemistry; D012666:Semiconductors; D013691:Tellurium / Q000737:chemistry
D019187:Cadmium Compounds; D037741:Fullerenes; D010720:Phosphines; D018036:Selenium Compounds; D007204:Indium; C058667:cadmium selenide; C069837:fullerene C60; D013691:Tellurium; C090882:indium phosphide; C028337:cadmium telluride