| 초록 |
A new donor-donor copolymer, poly-phenanthro[1,10,9,8-cdefg]carbazole-thiophene, PP-Th was synthesized for narrow band green-selective organic photodiode (OPD) application. PP-Th revealed narrow band green-selective visible light absorption peak at 510 nm with low full width at half-maximum (FWHM) value of 98 nm. In addition, deep ionization energy of PP-Th made it less susceptible to oxidational degradation. Green-selective OPDs were fabricated utilizing PP-Th as a green absorbing donor material and ZnO as a non-absorbing acceptor material. The optimized OPD rendered a very low dark current of 2 nA cm-2 and a high detectivity of 1.42 × 1012 Jones with narrow band green-selectivity. Moreover, PP-Th enabled OPD with a 3-dB bandwidth of 3.1 kHz and a linear dynamic range of 84.9 dB. Furthermore, the responsivity of the OPD could be maintained for more than 30 days under atmospheric condition, revealing excellent stability of PP-Th. |
