Efficiency Improvement of Solar Cell with ZnO Nanotip Array Prepared by Aqueous Solution Deposition

2011 ◽  
Vol 339 ◽  
pp. 283-286
Author(s):  
Ming Kwei Lee ◽  
Nai Roug Cheng ◽  
Cho Han Fan ◽  
Chih Feng Yen
Keyword(s):  
Aqueous Solution ◽  
Solar Cell ◽  
Buffer Layer ◽  
Growth Direction ◽  
Zinc Nitrate ◽  
Average Height ◽  
Efficiency Improvement ◽  
Solution Deposition ◽  
Ito Glass ◽  
Zno Buffer Layer

ZnO nanotips were synthesized on a sputtered ZnO buffer layer/ITO/glass by aqueous solution deposition with precursors of zinc nitrate and ammonia. Growth direction of ZnO nanotips can be controlled by the thickness of sputtered ZnO buffer layer. The average height of 13 μm was obtained at 70 °C for 24 hr and the diameter of ZnO nanotips was ranged from 60 nm to 100 nm.

Density of ZnO Nanotip Array Controlled by ZnO Seed Layer

2012 ◽  
Vol 229-231 ◽  
pp. 252-255
Author(s):  
Ming Kwei Lee ◽  
Nai Roug Cheng ◽  
Cho Han Fan ◽  
Chih Feng Yen
Keyword(s):  
Buffer Layer ◽  
Thermal Annealing ◽  
Seed Layer ◽  
Visible Region ◽  
Zinc Nitrate ◽  
Average Height ◽  
Solution Deposition ◽  
Uv Emission ◽  
Ito Glass ◽  
Zno Buffer Layer

ZnO nanotips were synthesized on a sputtered ZnO buffer layer/ITO/glass by aqueous solution deposition with precursors of zinc nitrate and ammonia. The density of ZnO nanotips can be controlled by the thickness of sputtered ZnO buffer layer. The average height of 13 μm was obtained at 70°C for 24 hr and the diameter of ZnO nanotips was ranged from 60 nm to 100 nm. By thermal annealing at 300 oC in N2, the ZnO quality can be much improved and strong Micro-PL UV emission (380 nm) and lower defect emission (520 nm) of visible region are obtained. After thermal annealing at 300 °C in O2, both emissions are much improved.

Effects of particle morphology of ZnO buffer layer on the performance of organic solar cell devices

2013 ◽  
Vol 112 ◽  
pp. 6-12 ◽  
Author(s):  
P.S. Mbule ◽  
T.H. Kim ◽  
B.S. Kim ◽  
H.C. Swart ◽  
O.M. Ntwaeaborwa
Keyword(s):  
Solar Cell ◽  
Buffer Layer ◽  
Organic Solar Cell ◽  
Particle Morphology ◽  
Zno Buffer Layer

Transparent and Compact Zinc Oxide Thin Films via Two-Step Electrodeposition from Aqueous Solution

2007 ◽  
Vol 336-338 ◽  
pp. 2221-2223
Author(s):  
Fang Peng ◽  
Xiao Min Li ◽  
Xiang Dong Gao
Keyword(s):  
Aqueous Solution ◽  
Zinc Oxide ◽  
Optical Band Gap ◽  
Zinc Nitrate ◽  
Zno Films ◽  
Zno Film ◽  
Electrodeposition Process ◽  
Zinc Oxide Films ◽  
Ito Glass ◽  
Galvanostatic Deposition

Zinc oxide films have been deposited on ITO/glass substrate by a two-step electrodeposition method from zinc nitrate aqueous solution. The two-step electrodeposition process included a potentiostatic pre-deposition and a galvanostatic deposition. Obtained ZnO film possesses high c-axis preferential orientation, smooth and compact morphology, high transmittance in the visible band, and optical band gap of 3.43eV. Compared with the film prepared by direct galvanostatic deposition, the crystalline quality and optical properties of ZnO films were significantly improved.

Fabrication of Transparent Superhydrophobic Surface from ZnO Nanorods

2021 ◽  
Vol 21 (3) ◽  
pp. 1772-1778
Author(s):  
Hwa-Min Kim ◽  
Chang-Hyun Lee ◽  
Jiseon Kwon ◽  
Jongjae Kim ◽  
Bonghwan Kim
Keyword(s):  
Buffer Layer ◽  
Superhydrophobic Surface ◽  
Zno Nanorods ◽  
Optical Transmittance ◽  
Growth Direction ◽  
Contact Angles ◽  
Processing Temperature ◽  
Glass Substrates ◽  
Corning Glass ◽  
Zno Buffer Layer

A transparent superhydrophobic surface was fabricated from ZnO nanorods grown on Si and glass substrates in a thermal furnace for industrial applications such as surface coating. Two types of glasses were used for the substrates: slide glass and Corning glass. The ZnO nanorods were then coated with PTFE using existing sputtering technology and then grown on the glasses. The optical transparency and processing temperature of the nanorods on the substrates with and without a ZnO buffer layer were investigated, for comparison. The superhydrophobic surface formed on Corning glass with a 50-nm-thick ZnO buffer layer exhibited a transparency of 80% or higher and a water contact angle of 150° or higher in the visible light region. High optical transmittance of the superhydrophobic surface was achieved by controlling the size and growth direction of the nanorods. X-ray diffraction and scanning electron microscopy images showed that the nanorods on the glass substrates were thicker than those on Si, and the nanorods predominantly grew in the vertical direction on the buffer layer. However, the growth direction did not affect the wettability of the surface. Vertically grown nanorods can still affect optical transmittance because they facilitate the propagation of light. In the case of Corning glass, superhydrophobic surfaces with contact angles of 150° and 152.3° were formed on both samples with buffer layers of 50 nm and 100 nm, respectively. Therefore, a buffer layer thickness in the range of 50–100 nm is suitable for realizing a transparent superhydrophobic surface on a glass substrate.

scholarly journals Efficiency Improvement of CZTSe Solar Cell with Ag Doped Zno/Cds Buffer Layer, using Scaps Simulation Programme

2019 ◽  
Vol 8 (9S2) ◽  
pp. 471-476
Keyword(s):  
Solar Cell ◽  
Buffer Layer ◽  
Absorber Layer ◽  
Efficiency Improvement ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Simulation Process ◽  
Numerical Studies ◽  
Toxic Materials ◽  
Simulation Programme

Compound semiconductor CZTSe is a popular absorber layer for thin film solar cells. Instead of single semiconductor buffer layer, a hybrid buffer layer is used with CZTSe absorber layer. To reduce further usage of toxic materials(CdS) and simultaneously to increase the solar cell efficiency, Ag doped buffer layer was proposed and a numerical studies were performed using SCAPS 1-D simulation programme. Also the thickness and the carrier density of the different layers in the solar cell were optimized to achieve the above goals. After the simulation process, the toxic materials usage was reduced by 62% and the efficiency was increased from 12.24% to 12.69%

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