Light emitting devices using poly (p-phenylene vinylene)/porous silicon composites

Synthesis of Light-Emitting Conjugated Polymers for Applications in Electroluminescent Devices

“…Composites of PPV with porous silicon show lower turn-on voltages than PPV. 2365,2366 Dielectric nanocrystals are reported to broaden the emission spectra of PPV and the PPP 1147a, but whereas the spectrum of PPV is blue-shifted, the latter shows a red-shift. 2367 The fluorescence of composites of polyquinolines 690b and porous silica is reported to depend upon the pore size, with the emission maximum occurring at 490 nm in small pores and at 545 nm in large ones.…”

Surface modification and functionalization through the self-assembled monolayer and graft polymerization

“…Among them, one can list the formation of alkyl monolayers [85,86], derivatization with alcohols through electrochemical and thermal reactions [87], derivatization with halogens [88], photoelectrochemical esterification reactions with carboxylic acids and with alcohols [89], and reaction with chlorosilanes [90]. In addition, modification of the porous silicon film by polymer deposition was also employed in order to improve its use for sensors, electroluminescent devices, and other hybrid devices [91][92][93][94][95]. To achieve a highly dense polymer coating on the surface of 3-5 nm size nanoparticles, the so-called bgrafting-fromQ technique is preferable to those that attempt to link existing polymer chains to the surface [96][97][98][99].…”

Luminescent Silicon Nanoparticles Capped by Conductive Polyaniline through the Self-Assembly Method

“…This includes free radical initiation to form alkyl monolayers, , derivatization with alcohols through electrochemical and thermal reactions, derivatization with halogens, photoelectrochemical esterification reactions with carboxylic acids and with alcohols, and reactions with chlorosilanes . In addition, modification of the porous silicon film by polymer deposition was also achieved to improve its functionality for use in sensors, electroluminescent devices, and other hybrid devices. − …”

“…22 In addition, modification of the porous silicon film by polymer deposition was also achieved to improve its functionality for use in sensors, electroluminescent devices, and other hybrid devices. [23][24][25][26][27] Several methods have been developed to produce freestanding silicon nanoparticles that are nonporous and free from a substrate. These include ultrasonic dispersion of porous silicon, 28 solution synthesis, 29 gas-phase decomposition of silanes, 30 laser-vaporization controlled condensation, 31 organosilane decomposition in supercritical organic solvents, 32 and laser-driven decomposition of silane.…”