Abstract
Rubrene, perylene, -quaterthiophene, and tetracene single crystals were grown and placed between indium- tin-oxide and Al electrodes; the current-voltage characteristics of the so-fabricated two-terminal organic devices were measured at ambient conditions under solar simulator illumination. While rubrene single crystals do not exhibit any pho- tovoltaic effect, open-circuit voltages reach values up to 1.8 V in devices based on perylene, -quaterthiophene, and tetra- cene single crystals.
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