Carbazole-based organic dye sensitizers for efficient molecular photovoltaics

Illumination and dipole layer effects on the density of state distribution in n-type organic thin film phototransistors based on naphthalene bis-benzimidazole: Experiment and modeling

“…Hence, research in OTFTs plays crucial role for the development and realization of many organic electronics technology like gas and image sensors, smart cards, active-matrix displays, radio-frequency identification tags [11][12][13][14].The conjugated polymers and small molecules are most commonly used as active layers for OTFTs. In particular, perylene and naphthalene bisimide derivatives are the most important attractive materials among the n-type organic semiconductors for its high electron mobility combined with excellent thermal and chemical stability, light sensitive [15][16][17][18][19][20][21]. N-type OTFTs is now believed to reach a competitive efficiency regime and high performance compared to the p-type OTFTs.…”

Synthesis and photovoltaic characterization of triarylamine-substituted quinoxaline push--pull dyes to improve the performance of dye-sensitized solar cells

“…In the last part of the synthesis, π -spacer (5) and boronic acid compound (9) were reacted and 4-formyl phenyl boronic acid and 2-tienyl boronic acid were attached to compound 10 via Suzuki coupling in the presence of palladium catalyst. These reagents (11,12) were condensed with cyanoacrylic acid via Knoevenagel condensation reactions in the presence of piperidine to result in the formation of the final dyes KD-148 and KD-150. All intermediates were confirmed by 1 H and 13 C NMR.…”

“…On the other hand, the tunable structure, high molar extinction coefficient, low production cost, easier synthetic procedure, purification, and low toxicity of all organic dyes make them more suitable candidates for DSSC applications. Thus, a great number triarylamine, 8,9 iminocoumarin, 10 carbazole, 11,12 perylene, 13 and many other derivatives in order to enhance light harvesting on the metal oxide surface by adding various side chains, arranging the length of the π -bridge groups, or using acceptor and donor groups with different electron affinities.…”

Optical Absorption and Electron Injection of 4-(Cyanomethyl)benzoic Acid Based Dyes: A DFT Study

“…Until now, the steady efficiency of the DSSCs is kept by a polypyridyl ruthenium sensitizer [2,[5][6][7]; however, we have to face the practical problems of ruthenium sensitizer utility, such as a very expensive cost. As an alternative, metal free organic sensitizers have received an increasing attention and can obtain efficiencies reaching 10% [8][9][10][11][12][13][14][15][16][17]. In terms of metalfree DSSCs, donor--bridge-acceptor (D--A) is a typical structure.…”

“…In terms of metalfree DSSCs, donor--bridge-acceptor (D--A) is a typical structure. Various organic dyes, such as coumarin [8,9], porphyrins [7,10] phenylene [11], carbazole dyes [12,13], indoline dyes [14,15], and bis-dimethyl fluoroaniline (JKs) [16] and Ds series [17], have been synthesized. The D--A molecular structures are constructed by electron donor (D), -conjugated linker and electron acceptor (A) moieties.…”