Energy transfer in close-packed PbS nanocrystal films

Ultrafast photoinduced dynamics in quantum dot-based systems for light harvesting

“…As a consequence, charge transfer between QDs is more efficient than energy transfer. The energy transfer only occurs for relatively large QD spacing [76,77].…”

Solution‐Processable Near‐IR Photodetectors Based on Electron Transfer from PbS Nanocrystals to Fullerene Derivatives

“…The imperfect matching of the two spectra could be ascribed to the thickness difference in the films (drop-cast vs. spin-coated films). [24] The photocurrent at 514 nm is five times higher than at the first excitonic absorption peak of PbS, giving rise to a responsivity of 320 mA W À1 at 1200 nm, which is still about 100 times the value reported for the best hybrid IR detectors. [16] An important characteristic of photoconductive detectors is the power dependence of the photocurrent.…”

Interdot carrier transfer in semimagnetic Pb1−xMnxSe nanocrystals embedded in oxide glass

“…Studies employing QDs as energy donors in the QDs-biconjugate system [14], the QDsorganic dye system [15,16], close-packed layered NCs films [17], interlayer self-assembed InAs QDs [18][19][20], as well as in a carrier tunneling transfer between coupling neighboring QDs [21,22], have been widely discussed at low-temperature, following a semiclassical Wentzel-Kramers-Brillouin approximation [18], transitions through continuum states that are assumed to be located in the vicinity of QDs [19,20], resonant energy transfer via an optical near-field interaction [21], and a Förster resonant energy transfer mechanism [14][15][16][17]. At temperatures higher than 100 K, carrier transfer processes based on thermally assisted tunneling process have been used in a double-stacked InAs/GaAs QDs [23].…”