Solar cells 太阳能电池

1.Introduction of solar cell and its superiority
Application
2. Working principle
quantum dot sensitized Solar cells
The process of electron-transfer：
(1) QD+hν→QD* (2) QD*→QD++e-(CB)
3)The rate of conversion is low currently
1.Introduction of solar cell and its superiority
wind energy coal
Contrast with other energy
solar energy aqua energy
Photo anode
Electrolyte
Counter-electrode
(3) e-(CB)→e-(BC) (4) I3-+2e- (CB)→3I(5)QD++e-(CB) →QD (6)I3-+2e-(CE) →3I(7) 3I-+2QD+→I3-+QD QD: quantum dot CB: conductor band BC: back contact
Ningbo university of technology
Solar cells
Reporter: wanglianbo 2013.09.27
Main content
1
Introduction of solar cells
2
3 4
composition of solar cells and working principle
4.Perovskite sensitized solar cells
Solid-state sensitized solar cell? Organic-inorganic hybrid solar cell? or p-i-n structure?
Dye, quantum dot Organic-inorganic Perovskite
3.Photo anode
Michael Gratzel et al，Laboratory for Photonics and Interfaces, Swiss Federal Institute of Technology, CH-1015
Poulomi Roy, Steffen Berger, and Patrik Schmuki(2010), TiO2 Nanotubes: Synthesis and Applications，Reviews DOI: 10.1002/anie.201001374
The perovskite (CH3NH3)PbI3 QD-sensitized 5.5 μm thick TiO2 films depending on concentration of the equimolar mixture of CH3NH3 and PbI2 (1)was obtained by deposition of 10.05wt% (2)was obtained by deposition of 20.13wt
Figure 1. The composition of QD sensitized solar cells
2. Working principle
Figure 2. The composition of dye sensitized solar cells
3.Photo anode
QD
Photo anode
Figure 3. Progress in solid-state DSSCs.
Perovskite/Al2O3/TiO2
P = 15.4%
P = 12.3%
Lee, M. M., J. Teuscher, et al. (2012). "Efficient hybrid solar cells based on meso-superstructured organometal halide perovskites." Science 338(6107): 643-647.
3) The production process is Complex
4) High costs
2)The cost is lower than Silicon -based solar cells
3)The rate of conversion is low
2)These offer the prospective of very low cost fabrication
(3)was obtained by deposition of 30.18wt
(4)was obtained by deposition of 40.26wt
J. H., C. R. Lee, et al. (2011). "6.5% efficient perovskite quantum-dot-sensitized solar cell." Nanoscale 3(10): 4088-4093.
Photosensitized solar cells
Time
1.Introduction of solar cell and its superiority
Silicon-based solar cells
1) Production process has been very adept
2) mass production and high rate of conversion
Thin-film solar cells
Photosensitization solar cells
1)The progress of production Is more complex than Silicon -based solar cells
1)The progress of production is sample
Photo anode
Perovskite sensitized solar cells
5
My plan
1.Introduction of solar cell and its superiority
Classification
Silicon-based solar cells
Thin-film solar cells
• 2. Experimental apparatus and to optimize process to synthesize TiO2 nanotubes
TiO2 nanorods/perovskite
Easily pore filling of the HTM
Burschka, J., N. Pellet, et al. (2013). "Sequential deposition as a route to high-performance perovskite-sensitized solar cells." Nature 499(7458): 316-319.
P型有机空穴导体（hole transport） i吸收光（perovskite）
N型TiO2 (电子传输)
Perovskite—(钙钛矿) CH3NH3PbX3
Brown—CH3NH3 Red—Pb Blue--I
Layer structure
Quantum well 1. Light extinction coefficiency 10 times higher than Dyes 2. Stability 3. Bandgap controllable
3.Photo anode
3.Photo anode
CBD
Titanium substrate
Anodic oxidation process
Sol-gel
Photo anБайду номын сангаасde
Factors：
Deposition time
Solution composition Basis material
Electrolytic deposition
The next big thing in photovoltaics
1. Light trapping 2. Bandgap control 3. Multiple absorbance layer
4. Quantum effect
5. Deposition method
My plan
• 1. Read more literature（ perovskite sensitized ） about solar cells
FTO
Semiconductor oxide
Figure 3. Schematic representation of QDSCs based on a) mesoporous wide-band semiconductor film b) nanorod and c) inorganic nanotube