Abstract
A new type of organic visible-blind UV-PDs is demonstrated by utilizing phosphorescent material Ir(III)bis[(4,6-difluorophenyl)-pyridinato-N, C20 ] picolinate (FIrpic) as the electron donor and [6,6]-phenyl-C-61- butyricacidmethylester (PCBM) as the electron accepter, respectively. The peak responsivity of the organic UV-PDs is as high as 140 mA/W, corresponding to an external quantum efficiency of about 48%, under 365 nm UV light with an intensity of 0.018 mW/cm2. The distinct photoluminescence quenching of FIrpic is obtained by doping PCBM. The organic UV-PDs provide visible-blind performance with the strong photocurrent response in the UV-A region, the rise and fall times of less than one second, and linear response within the incident light-intensity range from 0.018 to 20 mW/cm2.
| Original language | English |
|---|---|
| Pages (from-to) | 3823-3826 |
| Number of pages | 4 |
| Journal | Optics Letters |
| Volume | 38 |
| Issue number | 19 |
| DOIs | |
| Publication status | Published - 1 Oct 2013 |
| Externally published | Yes |