Morphological impact of zinc oxide layers on the device performance in thin-film transistors

Abstract

Zinc oxide thin-films are prepared either by spin coating of an ethanolic dispersion of nanoparticles (NP, diameter 5 nm) or by spray pyrolysis of a zinc acetate dihydrate precursor. High-resolution electron microscopy studies reveal a monolayer of particles for the low temperature spin coating approach and larger crystalline domains of more than 30 nm for the spray pyrolysis technique. Thin-film transistor devices (TFTs) based on spray pyrolysis films exhibit higher electron mobilities of up to 24 cm2 V(-1) s(-1) compared to 0.6 cm2 V(-1) s(-1) for NP based TFTs. These observations were dedicated to a reduced number of grain boundaries within the transistor channel.

Effects of Thermal Pressing on ZnO Nanoparticle Layers Deposited by Drop Casting

“…Therefore, many efforts have been made to incorporate ZnO NP layers into TFTs. [1][2][3][4][5][6][7] Generally, NP layers have been generated mainly by annealing and plasma treatments to control surface chemistry and crystallinity. However, few reports have addressed the degree of adhesion and mutual binding between individual NPs.…”

Influence of thermal annealing on the photo catalytic properties of TiO2 nanoparticles under solar irradiation

“…Rutile phase of TiO 2 is more stable than the other two phases and the transformation from anatase and brookite to rutile can be achieved by thermal annealing [5][6][7]. Nanosized TiO 2 has found applications in many fields like gas sensors [8,9] transistors [10], light-emitting diodes (LED) [11], sunscreen [12], field emission devices [13] and solar cells [14]. The properties of TiO 2 most probably depend upon the preparation method.…”

Donor–acceptor binding interaction of 1-(naphthalene-1-yl)-2,4,5-triphenyl-1H-imidazole with semiconductor nanomaterials

“…3.2 eV and an exciton binding energy of 60 meV have potential applications in nanoelectronics [1], nanooptelectronics [2], nanopiezotronics [3], varistor devices [4], field emission devices [5], thin-film transistors [6], lasers [7], dye-sensitized solar cells (DSSC) [8], gas sensors [9], sunscreens [10], catalysis [11], photocatalysis [12] and bacteria disinfection [13]. Investigation of light induced electron transfer from N-containing heterocyclic molecules to nanostructured semiconductor is of interest due to its pivotal role in DSCC [14], medicine for diagnostics and imaging [15] and photodynamic therapy [16].…”