Efficient Organic p-i-n Solar Cells Having Very Thick Codeposited i-Layer Consisting of Highly Purified Organic Semiconductors

p-i-n organic solar cells having very thick codeposited i-interlayer reaching 1.2 mu m were successfully fabricated by using fullerene purified by means of the single-crystal formed sublimation. Short-circuit photocurrent density of 19mAcm(-2) and photo-electric conversion efficiency of 5.3% were observed.