Thymine: buffer layer for high performance green light-sensitizing organic photodetector

Abstract

The effect of thymine as a buffer layer has been examined on the performance of organic photodetectors. As the decreasing dark current with incorporation of buffer layer, a significant increase in detectivity for the devices is observed. The buffer layer of thymine improves the device performance by blocking charge transport at the buffer layer-active layer interface and forming a smooth surface of the ZnO. The best OPD performance was obtained for 5 nm thickness of buffer layer, with dark current of 2.19 x 10⁻⁸ A/cm² and detectivity of 3.29 x 10¹² Jones at −1 V.

Keywords:

• Organic photodiode
• buffer layer
• thymine
• detectivity