Low-Temperature Cross-Linkable Small Molecules for Fully Solution-Processed OLEDs.

Cross-linkable hole-transporting, host, and electron-transporting materials with a new cross-linking group, uracil, are designed and synthesized. These compounds exhibited good solubility in common organic solvents and excellent solvent resistance after cross-linking at a low temperature of 120 °C. The OLED was fabricated by all-solution processing using cross-linkable synthetic compounds, except for the electrodes. This device exhibited a current efficiency of 39.2 cd A-1 and a power efficiency of 15.3 lm W-1 .

Alkylated fullerene derivatives for solution-processable organic thin-film transistors and bulkheterojunction solar cells.

In this paper, we report synthesis and characterization of alkylated fullerene derivatives for solution-processable organic thin film transistors and solar cells. Their physical, thermal, and semiconducting properties have been studied. Organic thin-film transistors fabricated from C60TH-Oc exhibit electron mobilities as high as 3.2 x 10(-2) cm2 V(-1) s(-1) with 32 V of a threshold voltage. The best power conversion efficiency (PCE) was observed in a layered structure P3HT:C60TH-Oc (PCE = 0.44%), which was a twice value of P3HT:C60TH-Dd (PCE = 0.23%).

Fabrications of electrospun nanofibers containing inorganic fillers for dye-sensitized solar cells.

Poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) nanofibers containing inorganic fillers were fabricated by electrospinning. Dye-sensitized solar cells (DSSCs) using these nanofibers showed improved short circuit currents without degraded fill factors or open circuit voltages. The long-term stabilities of cells using electrospun PVDF-HFP/titanium isopropoxide (TIP) nanofibers were significantly improved.