期刊
ORGANIC ELECTRONICS
卷 12, 期 5, 页码 865-868出版社
ELSEVIER
DOI: 10.1016/j.orgel.2011.02.012
关键词
Organic light-emitting diode; Very-high color rendering index; Carrier regulating layer
资金
- National Science Council [NSC-96-2628-E-007-019-MY3, NSC-100-3113-E-007-002]
- National Tsing Hua University
- Taiwan Semiconductor Manufacturing Company
Very-high color rendering index (CRI > 90) is extremely crucial for lighting in surgery, photography and exhibition of museums etc. We demonstrate herein an efficient very-high CRI organic light-emitting diode with CRI of 98 with an efficacy of 8.3 lm/W at 100 cd/m(2), or CRI of 96 with 5.2 lm/W at 1000 cd/m(2). The very high CRI may be attributed to the successful deposition and emission of the two full-spectrum complementary white emissive layers, especially as a thin interlayer is inserted in between to regulate the injection of carriers. Without the interlayer, the resultant CRI drops to 73 and efficacy to 3.6 lm/W at 1000 cd/m(2). The employment of the carrier regulating layer also helps disperse the injected carriers, leading recombination to occur in a wider area and hence a higher efficiency. (C) 2011 Elsevier B.V. All rights reserved.
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