Sains Malaysiana 39(4)(2010): 627–631
Effects of Annealing
Temperature on the Optical Properties and Device Performance of Ag / n-Si /
CuPc / Ag Solar Cell Prepared via Spin Coating Method
(Kesan Suhu Sepuh Lindap ke
atas Sifat Optik dan Prestasi Peranti Sel Suria Ag / n-Si / CuPc / Ag yang
disediakan Melalui Kaedah Salutan Berputar)
HanashriahHassan*, Noor Baa’yahIbrahim& Zahari Ibarahim
School of Applied Phyics, Universiti Kebangsaan Malaysia, 43600 UKM Bangi,
Selangor, Malaysia
Diserahkan: 14 Ogos 2009 / Diterima: 5 November 2009
ABSTRACT
Copper
phthalocyanine (CuPc) thin films have been prepared using a simple spin coating
method. The films were annealed at 5 different temperatures (323, 373, 473, 523
and 573 K) for one hour in air. Optical properties study using the UV-Vis
spectrophotometer showed that in the range of wavelength of 300-800 nm, all of
the films have identical absorption coefficient patterns and there was no
systematic changes with respect to annealing temperature. The film annealed at
373 K showed the highest absorbance while the lowest absorbance was shown by
the film annealed at 323 K. The results showed that the optical band gaps
depended on the temperature. The film annealed at 373 K has the lowest optical
energy gap. Using the five annealed films, solar cell with the configuration of
Ag / n-Si / CuPc / Ag were fabricated. Under the 50 W/cm2 light illumination, the current voltage measurements at
room temperature were carried out on the device. The device which consists of
film annealed at 373 K exhibited the best photovoltaic characteristics. The
different annealing temperature also affect the photovoltaic behavior of the
devices in a non-systematic way.
Keywords:
Annealing; current-voltage; optical band gap; solar cell
ABSTRAK
Filem nipis
kuprum ftalosianina (CuPc) telah disediakan melalui kaedah ringkas salutan
berputar. Filem tersebut disepuh lindap pada 5 suhu yang berbeza (323, 373,
473, 523 dan 573 K) selama satu jam dalam udara. Sifat optik yang dikaji
menggunakan UV-Vis spektrofotometer menunjukkan pada julat panjang gelombang
300-800 nm, semua filem mempunyai corak pekali penyerapan yang sama dan tiada
perubahan sistematik terhadap suhu sepuh lindap. Filem yang disepuh lindap pada
373 K menunjukkan penyerapan tertinggi manakala penyerapan terendah ditunjukkan
oleh filem yang disepuh lindap pada 323 K. Keputusan menunjukkan jurang tenaga
optik adalah bergantung kepada suhu. Filem yang disepuh lindap pada suhu 373 K
mempunyai jurang tenaga optik paling rendah. Menggunakan kelima-lima filem yang
disepuh lindap itu, sel suria dengan konfigurasi Ag / n-Si / CuPc / Ag telah
difabrikasi. Di bawah pancaran 50 W/cm2, pengukuran arus-voltan pada suhu bilik telah dilakukan
ke atas peranti. Peranti yang mengandungi filem yang disepuh lindap pada 373 K
mempamerkan ciri fotovoltaik terbaik. Suhu sepuh lindap yang berbeza juga
memberi kesan kepada sifat fotovoltaik peranti secara tidak sistematik.
Kata kunci:
Arus-voltan; jurang tenaga optik; sepuh lindap; sel suria
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* Corresponding author; email: baayah@ukm.my
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