摘要We investigate the effect of thermal annealing before and after cathode deposition on the stability of polymer light-emitting diodes (PLEDs) based on green fluorescent polyfluorene derivative. The annealed PLEDs exhibit improved charge transport and red-shift emission compared to the as-fabricated device. The stability of the PLEDs is largely enhanced by post-annealing before and after Ca deposition, which is attributed to the enhanced charge transport and the intimate contact between the cathode and the emissive layer.
Abstract：We investigate the effect of thermal annealing before and after cathode deposition on the stability of polymer light-emitting diodes (PLEDs) based on green fluorescent polyfluorene derivative. The annealed PLEDs exhibit improved charge transport and red-shift emission compared to the as-fabricated device. The stability of the PLEDs is largely enhanced by post-annealing before and after Ca deposition, which is attributed to the enhanced charge transport and the intimate contact between the cathode and the emissive layer.
YAO Bing;XIE Zhi-Yuan;YANG Jun-Wei;CHENG Yan-Xiang;WANG Li-Xiang. Enhancement of Stability of Polymer Light-Emitting Diodes by Post Annealing[J]. 中国物理快报, 2007, 24(5): 1383-1835.
YAO Bing, XIE Zhi-Yuan, YANG Jun-Wei, CHENG Yan-Xiang, WANG Li-Xiang. Enhancement of Stability of Polymer Light-Emitting Diodes by Post Annealing. Chin. Phys. Lett., 2007, 24(5): 1383-1835.
[1] Burroughes J H, Bradley D D C, Brown A R, Marks R N, Mackey K,Friend R H, Burn P L and Holmes A B 1990 Nature 347 539 [2] Kim S Y, Kim K Y and Tak Y H and Lee J L 2006 Appl. Phys.Lett. 89 132108 [3] Gautier E, Lorin A, Nunzi J M, Schalchli A, Benattar J J and VitalD 1996 Appl. Phys. Lett. 69 1071 [4] Aziz H, Popovic Z D, Hu N X, Hor A M and Xu G 1999 Science 283 1900 [5] Shina H J, Jung M C, Chung J, Kim K, Lee J C and Lee S P 2006 Appl. Phys. Lett. 89 063503 [6] Tang C W, VanSlyke S A and Chen C H 1989 J. Appl. Phys. 65 3610 [7] Hamada Y, Sano T, Shibata K and Kuroki K 1995 Jpn. J. Appl.Phys. II 34 L824 [8] Shi J and Tang C W 1997 Appl. Phys. Lett. 70 1665 [9] Kuwabara Y, Ogawa H, Inada H, Noma N and Shirota Y 1994 Adv.Mater. 9 677 [10] Tokito S, Tanaka H, Okada A and Taga Y 1996 Appl. Phys.Lett. 69 878 [11] Kim J S, Friend R H, Grizzi I and Burroughes J H 2005 Appl.Phys. Lett. 87 023506 [12] VanSlyke S A, Chen C H and Tang C W 1996 Appl. Phys. Lett. 69 2160 [13] Hung L S, Tang C W and Mason M G 1997 Appl. Phys. Lett. 70 152 [14] Lee T W, Kim M G , Kim S Y, Park S H, Kwon O, Noh T and Oh T S2006 Appl. Phys. Lett. 89 123505 [15] Liu J, Guo T and Yang Y 2002 J. Appl. Phys. 91 1595 [16] Lee T and Park O O 2000 Adv. Mater. 12 801 [17] Niu Y, Hou Q and Cao Y 2002 Appl. Phys. Lett. 81 634 [18] Sun R G, Wang Y Z, Wang D K, Zheng Q B, Kyllo E M, Gustafson T Land Epstein A J 2000 Appl. Phys. Lett. 76 634
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