TITLE:
Investigation of Nickel Phthalocyanine Thin Films for Solar Cell Applications
AUTHORS:
Eman M. Nasir, Mohammed T. Hussein, Addnan H. Al-Aarajiy
KEYWORDS:
Nickel Phthalocyanine, Optical Property, Electrical Property, Photoluminescence, Solar, Cell
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.9 No.8,
August
30,
2019
ABSTRACT: Ni-Phthalocyanine thin films were thermally
evaporated with different substrate temperatures (300 - 450) K on (silicon wafer,
glass) substrates. The chemical bonds of NiPc powder were investigated by FTIR
spectrum, which introduce good information for NiPc bonds and their locations.
The optical properties have been studied by UV-Visible, and Photoluminescence
(PL) Spectra. The NiPc thin films have direct gap for all samples. The values
of energy gap which is calculated by PL spectra are lower than those calculated by Tauc equation.
It is found there are three activation
energies, the mobility and concentration of carriers have been measured and,
the NiPc films are p-type. P-NiPc/n-Si HJ solar cell
was fabricated at substrates temperatures (300, 400) K. From I-V and C-V characteristic,
abrupt junction has been found, photovoltaic characteristics have been observed
with Voc of (0.335 - 0.415) V, and Isc of (2.77 -
4.26) μA, and the efficiency of (3.08 - 5.03)% at room temperature and
substrate temperature (300, 400 K) and under illumination of 55 mW/cm2 using Halogen lamp. Ideality factors of the junction increase
from (0.61 - 0.73) and barrier height increases from 2.53 eV to 3.69 eV while
shunt resistance decreases from 3.76 KΩ to 2.59 KΩ and series resistance
decreases slightly from 0.24 KΩ to 0.23 KΩ. The fill factor decreases from 0.46 to 0.4 with the increase of substrate temperature.