Vikrant Sista Roll No: EE10S012 IR and UV solar cells for windows and energy scavenging applications
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- Slide 1
- Vikrant Sista Roll No: EE10S012 IR and UV solar cells for
windows and energy scavenging applications
- Slide 2
- Sources Richard R Lunt and Valdamir Bulovic, Transparent,
near-infrared organic photovoltaic solar cells for window and
energy-scavenging applications, Appl. Phys. Lett. 98, 113305 (2011)
Man Gu Kang et.al., Manufacturing method for transparent electric
windows using dye-sensitized TiO2 solar cells, Sol. Energ. Mat.
Sol. C., 75, 475 (2003)
- Slide 3
- Outline Motivation Introduction IR solar sell device and
performance UV solar cell device and performance Summary
- Slide 4
- Motivation Reflective or tinted windows used in automobiles and
buildings Using low cost transparent PV technology the reflected
ight will be used for energy generation Absorbing UV and IR and
transmitting visible allows for lighting Combined advantage of
power generation,lighting and temperature control
- Slide 5
- IR Solar cell Hetero Junction PV Chloroaluminumpentac ene
(molecular donor) C 60 (molecular acceptor) BBAR Broadband
Antireflection coating DBR Distributed Bragg Reflector(stop band
800nm)
- Slide 6
- IR Solar Cell Fabrication Glass substrate coated with ITO
Thermal evaporation of MoO 3,ClAlPc,C 60,BCP RF sputtering of ITO
directly on BCP DBR sputtered separately on quarts substrate BBAR
precoated on quartz substrate and attached to glass substrate using
index matching fluid
- Slide 7
- IR Solar Cell: Performance Efficiency(Open Diamond) Average
Visual Transmission(Open Star) Open Circuit Voltage(triangles)
Fill-Factor(square) Short Circuit Current(circle)
- Slide 8
- IR Solar Cell: Performance Transmission spectra of the OPV
device for various ITO thickness and with and without NIR
mirror
- Slide 9
- IR Solar Cell: Performance Picture (a) without the transparent
OPV Picture (b) with OPV Picture (a) shows the OPV region overlaid
on it with orange boxed showing active area A series integrated OPV
powering a LCD clock
- Slide 10
- UV solar cells UV solar cells are not a major focus for energy
scavenging applications as not much UV reaches surface But solar
cells are still developed which absorb in UV range Three approaches
exist Shift UV to another region and then use in a regular solar
cell(Turbo Solar) Harness using GaN doped with Magnesium Dye
N719
- Slide 11
- UV Solar Cell Dye +TiO2 active region Dye (N719) used for UV
absorption Exposure to light excites the dye and electron injected
into the TiO 2 Dye then absorbs electron form Pt/electrolyte
- Slide 12
- UV Solar Cell: Fabrication TiO2 colloid made into slurry and
coated on glass substrate with ITO coated Substrate then immersed
in solution with N719 dye for 24 hours to sensitize it Platinum
electrode formed by spreading hexachloroplatanic acid over glass
substrate and heating Iodide electrolyte introduced through the
holes in platinum electrode glass Finally the two substrates are
sealed using surlyn Holes in the glass substrate covered using
surlyn and glass
- Slide 13
- UV Solar cell: Performance UV to visible absorption of N719
dye
- Slide 14
- Prototype of the designed Window
- Slide 15
- UV Solar cell: Performance Average Visible transmittance is 60%
The solar cell has a Voc of 0.64V and J sc of 250mA and area of
each solar cell is 64cm 2 Series connection of 9 such solar cell
gives a open circuit voltage of 5.7V and a J sc of 220mA at one sun
condition
- Slide 16
- Thank you