電荷阻擋層對光增益有機光偵測器之偵測度影響

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

林書丞(Shu-Cheng Lin)

指導教授 ： 陳方中

國立交通大學/光電學院/照明與能源光電研究所/碩士(2011年)

https://doi.org/10.6842/NCTU.2011.00692

摘要

本研究中我們利用三種不同的電洞阻擋層，BCP、Bebq2與TPD提升光增益有機光偵測器之效能，其目的在於抑制在逆向偏壓下電洞的注入和降低暗電流，再加上載子的再結合減少而提升了外部量子效率，因此最終能提升有機光增益光偵測器之偵測度。從實驗結果可發現，BCP與Bebq2在某些厚度之下對元件之偵測度會提升，因而我們了解到使用正確且適當厚度的阻擋層，對元件的表現有很大的幫助。

關鍵字

光增益有機光偵測器 ； 電荷阻擋層 ； 偵測度

並列摘要

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.

並列關鍵字

Organic photomultiple photodetectors ； Charge blocking layers ； Detectivites

參考文獻

of spherical tin inclusions in copper by magnetic sensing. Appl. Phys. Lett. 88, 11, 2000.

3. G. Yu, K. Pakbaz, and A. J. Heeger, Semiconducting polymer diodes: Large size, low cost photodetectors with excellent visible‐ultraviolet sensitivity. Appl. Phys. Lett. 64, 3422, 1994.

4. Kim, S.-S., S.-I. Na,J. Jo, G. Tae, and D.-Y. Kim, Efficient Polymer Solar Cells Fabricated by Sample Brush Painting. Adv. Mater. , 19, 4410, 2007.

5. Yan Yao, Yongye Liang, Vishal Shrotriya, Shengqiang Xiao, Luping Yu, and Yang Yang, Plastic Near-Infrared Photodetectors Utilizing Low Band Gap Polymer. Adv. Mater. 19, 3979, 2007.

6. G. Yu, J. Gao, J. C. Hummelen, F. Wudl, and A. J. Heeger, Polymer Photovoltaic Cells: Enhanced Efficiencies via a Network of Internal Donor-Acceptor Heterojunctions. Science, 270, 1789, 1995.