| AVS 57th International Symposium & Exhibition | |
| Energy Frontiers Topical Conference | Thursday Sessions |
| Session EN-ThP |
| Session: | Energy Frontiers Topical Conference Poster Session |
| Presenter: | S. Abdallah, Taif University, Saudi Arabia |
| Authors: | A. Badawi, Taif University, Saudi Arabia N. Al-Hosiny, Taif University, Saudi Arabia S. Abdallah, Taif University, Saudi Arabia S. Negm, Ain Shams University, Egypt H. Talaat, Ain Shams University, Egypt |
| Correspondent: | Click to Email |
Semiconductors quantum dots (QDs) has been paid much attention in QDs sensitized solar cell because of their high potential in light harvesting under visible region along with particle size tuning properties. CdTe semiconductor quantum dots (QDs) have become one of the promising materials for high efficiency photovoltiac solar cell [1]. It has a high extinction coefficient (4.4 x 10-4 M-1 cm-1) at 370 nm and valence band, conduction band, and band gap energies of -3.9, -5.5,and +1.6 eV, respectively, would behave as sensitizers capable of effectively injecting electrons into TiO2 NPs (band gap:3.4 eV)[2]. CdTe QDs were fabricated by the chemical solution deposition (CD) technique [3]. In this article we describe the preparation and photovoltaic characterization of CdTe quantum dot-sensitized solar cells (QDSSCs). We coated Fluorine doped Tin Oxide (FTO) substrates with 20 nm-diameter TiO2 nanoparticles (NPs) by the doctor blade method. Then, the as prepared CdTe quantum dots of different sizes were deposited on the TiO2-coated substrates by the chemical bath deposition (CBD) technique for various periods of dipping times under ambient conditions. Other FTO substrates were coated with platinum to form the counter electrode, while the electrolyte containing I−/I-3 redox species was sandwiched between the two electrodes. The I-V characteristic curve of the QDSSCs was measured under AM1.5-simulated sunlight at 100 mW/cm2. As a result, the open-circuit photovoltage Voc and the short circuit photocurrent density Jsc were about 0.48 volts and 300 μA/cm2 respectively. The fill factor FF and efficiency for energy conversion η of the photovoltaic cell were calculated to be about 0.48 and 0.113 %, respectively. Our results are comparable with that obtained by Guo-YuLan et-al [2].
References
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255 (2009).
[2] Guo-Yu Lan, Zusing Yang, Yang-Wei Lin, Zong-Hong Lin, Hao-Ying Liao and
Huan-Tsung Chang . J. Matt. Chemistry (19),2349 (2009).
[3] Dmitri V. Talapin, Stephan Haubold, Andrey L. Rogach, Andreas Kornowski, Markus Haase, and Horst Weller , J. Phys. Chem. B 2001, 105, 2260-2263