TY - JOUR
T1 - X-ray stability and response of polymeric photodiodes for imaging applications
AU - Keivanidis, Panagiotis E.
AU - Greenham, Neil C.
AU - Sirringhaus, Henning
AU - Friend, Richard H.
AU - Blakesley, James C.
AU - Speller, Robert
AU - Campoy-Quiles, Mariano
AU - Agostinelli, Tiziano
AU - Bradley, Donal D.C.
AU - Nelson, Jenny
N1 - Generated from Scopus record by KAUST IRTS on 2019-11-27
PY - 2008/1/28
Y1 - 2008/1/28
N2 - The x-ray stability of photodiodes made of poly(9,9-di- n -octylfluorene-co-benzothiadiazole):perylene diimide, poly[2,7-(9,9-di- n -octylfluorene)-co-(1,4-phenylene-[(4-sec-butylphenyl)imino]-1,4-phenylene)]: perylene diimide and poly(3-hexylthiophene):([6,6]-phenylC61-butyric acid methyl ester) (P3HT:PCBM) blends has been examined up to lifetime doses equivalent to those used in medical x-ray digital imaging applications. Dark currents and external quantum efficiencies (EQEs) are not significantly affected after exposure to 500 Gy. Only in the case of P3HT:PCBM is a significant loss in EQE (17% of the initial value) observed. Possible reasons for the observed changes are proposed. When a scintillation layer is attached to the devices, a linear dependence of the photocurrent on the x-ray dose rate is observed for the three material systems. © 2008 American Institute of Physics.
AB - The x-ray stability of photodiodes made of poly(9,9-di- n -octylfluorene-co-benzothiadiazole):perylene diimide, poly[2,7-(9,9-di- n -octylfluorene)-co-(1,4-phenylene-[(4-sec-butylphenyl)imino]-1,4-phenylene)]: perylene diimide and poly(3-hexylthiophene):([6,6]-phenylC61-butyric acid methyl ester) (P3HT:PCBM) blends has been examined up to lifetime doses equivalent to those used in medical x-ray digital imaging applications. Dark currents and external quantum efficiencies (EQEs) are not significantly affected after exposure to 500 Gy. Only in the case of P3HT:PCBM is a significant loss in EQE (17% of the initial value) observed. Possible reasons for the observed changes are proposed. When a scintillation layer is attached to the devices, a linear dependence of the photocurrent on the x-ray dose rate is observed for the three material systems. © 2008 American Institute of Physics.
UR - http://aip.scitation.org/doi/10.1063/1.2834364
UR - http://www.scopus.com/inward/record.url?scp=38349087203&partnerID=8YFLogxK
U2 - 10.1063/1.2834364
DO - 10.1063/1.2834364
M3 - Article
SN - 0003-6951
VL - 92
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 2
ER -