Oligo(phenylethynylene) as a High Photoluminescence Quantum Yield Material and Its Distributed Feedback Laser Emission in Thin Films

Abstract

The high photoluminescence quantum yield of phenylethynylene oligomers (see Figure for chemical formula) capped by different terminal groups, such as naphthyl or benzyl benzoates, coupled with their good solubility has led to their introduction as chromophores in a polymer matrix of poly(vinylcarbazole) for laser emission studies.

Blue surface-emitting distributed feedback lasers based on TPD-doped films

“…In addition, this technique is the most convenient for comparing the performance of different materials, since it allows separating the variations due to the material from those due to the resonant cavity. The laser properties of films of a wide variety of molecular semiconducting materials have been reported in the literature [6,[12][13][14][15][16][17][18][19][20][21][22]. In most cases, laser activity is observed at thresholds much lower than those of traditional dyes [23] and comparable to those of typical semiconducting polymeric laser materials [4,6].…”

Amplified spontaneous emission from a conjugated polymer undergone a high-temperature lithography cycle

“…The feedback in such cavities occurs due to the Bragg diffraction induced by a periodic corrugation, continuously reflecting a part of the wave propagating in the forward direction of the medium. Besides nonmorphological, 13,14 or photoinduced surface patterning, 15,16 the most promising lithographic approaches to fabricate wavelength-scale periodic structures in organic materials are various soft 17,18 and nanoimprinting 19,20 methods. Many of them exploit the glass transition of amorphous organics, namely they work by decreasing the viscosity driving the materials above their glasstransition temperature, T g , upon placing the films in contact with a previously fabricated mold.…”

Defined‐length Carbon‐rich Conjugated Oligomers

“…ally, many compounds with other functional groups, chromophores or electrophores attached to the OPE chain (direct or on a linker) were investigated, for example: NR 2 [154,155], OH [156][157][158][159][160][161][162][163], SR/SH [164][165][166][167][168][169][170][171][172][173][174][175][176][177][178][179], COOR [147, 156-158, 160, 180-184], additional CcCR groups [185][186][187], 2-naphthyl [181,188], steroid [189], fullerene [154,155], heterocycles [190][191][192][193][194][195][196][197][198], ferrocene and other metal complexes [175,176,179,…”