High-contrast photopatterning of photoluminescence within quantum dot films through degradation of a charge-transfer quencher.
Diffraction-limited, high-contrast photopatterning of the photoluminescence of layer-by-layer films comprising CdSe@CdS@ZnS quantum dots and polyviologen is reported. The photoluminescence of the quantum dots is initially quantitatively quenched due to ultrafast photoinduced electron transfer to polyviologen. Photopatterning is achieved by high-power or prolonged illumination in air, which photochemically degrades the polyviologen and thereby restores the photoluminescence of the quantum dots.
Department of Chemistry, Northwestern University, 2145 Sheridan Rd., Evanston, IL 60208-3113, USA.
Mario
M
Tagliazucchi
Victor A
VA
Amin
Severin T
ST
Schneebeli
J Fraser
JF
Stoddart
Emily A
EA
Weiss
D004579:Electron Transport; D055668:Photochemical Processes; D011095:Polyethylenes / Q000737:chemistry; D045663:Quantum Dots; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D014755:Viologens / Q000737:chemistry
D011095:Polyethylenes; D000644:Quaternary Ammonium Compounds; D014755:Viologens; C041004:poly-N,N-dimethyl-N,N-diallylammonium chloride