Although great efforts have been made, reproducible p-type doping is still one of the largest hurdles that hinders the optoelectronic applications of ZnO. In this Letter, a reproducible route to p-type ZnO films employing lithium–nitrogen as a dual-acceptor dopant has been demonstrated, and p-i-n structured light-emitting devices (LEDs) have been constructed. Obvious purple emissions have been observed from the LEDs, confirming the applicability of the p-type ZnO films in optoelectronic devices. The results reported in this Letter provide a reproducible route to p-type ZnO films, and thus may lay a solid ground for future optoelectronic applications of ZnO.
© 2011 Optical Society of America
Original Manuscript: November 5, 2010
Revised Manuscript: December 15, 2010
Manuscript Accepted: January 7, 2011
Published: February 8, 2011
F. Sun, C. X. Shan, B. H. Li, Z. Z. Zhang, D. Z. Shen, Z. Y. Zhang, and D. Fan, "A reproducible route to p-ZnO films and their application in light-emitting devices," Opt. Lett. 36, 499-501 (2011)