Emerging Materials Center, Samsung Advanced Institute of Technology, Samsung Electronics Co. , Yongin 446-712, Republic of Korea.
ACS Appl Mater Interfaces. 2013 Dec 26;5(24):13089-95. doi: 10.1021/am404122v. Epub 2013 Dec 3.
Green-sensitive organic photodetectors (OPDs) with high sensitivity and spectral selectivity using boron subphthalocyanine chloride (SubPc) derivatives are reported. The OPDs composed of SubPc and dicyanovinyl terthiophene derivative (DCV3T) demonstrated the highest green-sensitivity with maximum external quantum efficiency (EQE) of 62.6 % at an applied voltage of -5 V, but wide full-width-at-half-maximum (FWHM) of 211 nm. The optimized performance considering spectral selectivity was achieved from the composition of N,N-dimethyl quinacridone (DMQA) and SubPc showing the high specific detectivity (D*) of 2.34 × 10(12) cm Hz(1/2)/W, the EQE value of 60.1% at -5 V, and narrow FWHM of 131 nm. In spite of the sharp absorption property of SubPc with the maximum wavelength (λmax) at 586 nm, the EQE spectrum showed favorable green-sensitivity characterized by smooth waveform with λmax at 560 nm, which is induced from the high reflectance of SubPc centered at 605 nm. The photoresponsivity of the OPD devices was found to be consistent with their absorptance. Optimized DMQA/SubPc device showed the lowest value of blue crosstalk (0.42) and moderate red crosstalk (0.37), suggesting its promising application as a green-sensitive OPD.
使用硼次酞菁氯（SubPc）衍生物制备了具有高光敏度和光谱选择性的绿光敏感有机光电探测器（OPD）。由 SubPc 和二氰基乙烯基三噻吩衍生物（DCV3T）组成的 OPD 在-5 V 的外加电压下表现出最高的绿光灵敏度，最大外量子效率（EQE）为 62.6％，但全宽半最大值（FWHM）较宽，为 211nm。考虑到光谱选择性，通过 N，N-二甲基喹吖啶酮（DMQA）和 SubPc 的组成实现了优化的性能，表现出高的特定探测率（D*）为 2.34×10(12)cm Hz(1/2)/W，-5 V 时的 EQE 值为 60.1％，且 FWHM 较窄，为 131nm。尽管 SubPc 的最大吸收波长（λmax）为 586nm，但 EQE 光谱表现出良好的绿光灵敏度，其特征是具有 560nm 的最大波长（λmax）的平滑波形，这是由于 SubPc 在 605nm 处的高反射率引起的。发现 OPD 器件的光响应度与其吸收率一致。优化后的 DMQA/SubPc 器件的蓝色串扰（0.42）值最低，红色串扰（0.37）适中，表明其作为绿光敏感 OPD 具有广阔的应用前景。
