Heterostructures Based on Porphyrin/Phthalocyanine Thin Films for Organic Device Applications

Abstract

Multilayer or blend heterostructures based on porphyrins and phthalocyanines were obtained on different substrates using VTE and MAPLE methods. Stacked structures based on ZnPc and C60 with NTCDA were prepared by VTE on ITO/glass, their current value being increased by the deposition of the materials in an inverted configuration or by using ITO/PEDOT:PSS as a substrate. Multilayer structures comprising ZnPc and NTCDA were fabricated by MAPLE on an AZO/glass. Treating the AZO in oxygen plasma, a higher current value was obtained for the deposited heterostructures. The oxygen plasma treatment can increase the work function of the AZO resulting in a decrease of the energetic barrier from AZO/organic interface and finally improving the charge transport. Stacked layers or blend heterostructures having ZnPc, MgPc and TPyP were deposited by MAPLE on ITO/PET. In the case of those containing MgPc and TPyP, an increase in the current value (in dark) was obtained for the blend compared to the stacked layer configuration. For those with ZnPc and TPyP, under illumination, a photovoltaic effect was observed for the blend structure. All heterostructures are featured by a large absorption in the visible domain of the solar spectrum and suitable electrical properties for their use in OPV applications.

Mode-locked ytterbium-doped fiber laser with zinc phthalocyanine thin film saturable absorber

“…Zn-N vibration peaks were located at 875 and 500 cm −1 . Benzene breathing vibrational peaks are at 886 and 780 cm −1 [54][55][56][57]. The remaining characteristic peaks are related to PVA molecules, PVA being the host polymer for ZnPc thin film [58].…”

Two dimensional self-assembly zinc porphyrin and zinc phthalocyanine heterojunctions with record high power conversion efficiencies

“…For example, porphyrin exhibits a strong Soret band centered between 400-500 nm and a moderate Q band in the wave length range of 550-650 nm [8], while phthalocyanine has a high extinction coefficient in 600-800 nm spectral region [2]. Based on their extended conjugation, the near infrared part in their range of absorption spectrum can be enhanced [9]. In addition, their photo-physical and electrochemical properties are tunable by modifying their chemical structure [10].…”