Using Charge Blocking layers for Improving the Detectivites of Organic Photomultiple Photodetectors

• Main Authors: Lin, Shu-Cheng, 林書丞
• Other Authors: Cheng, Fang-Chung
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/52711972559803508829

碩士 === 國立交通大學 === 照明與能源光電研究所 === 99 === In this study, we demonstrated organic photomultiple photodetectors containing 2,9-Dimethyl-4,7-dipheny-1,10-phenantholine (BCP), Bis(10-hydroxybenzo[h]q uinolinato) beryllium (Bebq2) and N,N’-Bis(3-methylphenyl) N,N’-bis(phen yl) (TPD) as charge blocking materials for suppressing the hole injection and dark current under reverse bias conditions. In addition, we suspect that the increase of external quantum efficiency was due to the decrease of recombination. These changes led to an increase in detectivities. We also found that only in the specific thickness of BCP and Bebq2 can achieve high performance. Thus, proper choice of hole blocking layer materials led to high detectivities in the devices.