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M3D4 : Solar cell assembly

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Page 1: M3D4:Solarcell assembly - Amazon S3 · PDF fileWhatarewedoingtoday? • DSSC$background$(Jackie)$ • Main$components$of$aDSSC$$ • How$aDSSC$works:$where$do$the$e>$go?$ • KineAcs$in$aDSSC:$whatallows$–e

M3D4  :  Solar  cell  assembly  

Page 2: M3D4:Solarcell assembly - Amazon S3 · PDF fileWhatarewedoingtoday? • DSSC$background$(Jackie)$ • Main$components$of$aDSSC$$ • How$aDSSC$works:$where$do$the$e>$go?$ • KineAcs$in$aDSSC:$whatallows$–e

What  are  we  doing  today?  •  DSSC  background  (Jackie)  •  Main  components  of  a  DSSC    •  How  a  DSSC  works:  where  do  the  e-­‐  go?  •  KineAcs  in  a  DSSC:  what  allows  –e  to  move  in  the  direcAon  we  want?  

•  Overview  of  fabricaAon  process  (Jackie)  •  Doctor  blading  demo  (Griffin)  •  Build  solar  cells  in  Belcher  lab  

Page 3: M3D4:Solarcell assembly - Amazon S3 · PDF fileWhatarewedoingtoday? • DSSC$background$(Jackie)$ • Main$components$of$aDSSC$$ • How$aDSSC$works:$where$do$the$e>$go?$ • KineAcs$in$aDSSC:$whatallows$–e

DSSC  components  

General     Our  DSSC’s  •  Semi  –conductor:  TiO2  •  Sensi7zer  (dye):  N719  dye      •  Electrolyte  and  redox  mediator:  I3-­‐  /  I-­‐    

•  Counter  electrode:  PlaAnum  

•  Mechanical  support:  FTO  glass  with  TCO  (transparent  conducAng  oxide)  film  

Semi  –conductor  Counter  electrode  

Sensi7zer  

Semi  –conductor  

Mechanical  Support  

Page 4: M3D4:Solarcell assembly - Amazon S3 · PDF fileWhatarewedoingtoday? • DSSC$background$(Jackie)$ • Main$components$of$aDSSC$$ • How$aDSSC$works:$where$do$the$e>$go?$ • KineAcs$in$aDSSC:$whatallows$–e

How  a  DSSC  works:  where  do  the  e-­‐  go?  

hWp://www.solaronix.com  

1.    Dye  excita7on  

2.  –e  injec7on  

3.  –e  collec7on  

5.  Redox  mediator  reduced  

4.  –e  travel  to  counter  electrode  

6.  Dye  replenished  by  Redox  mediator  

Page 5: M3D4:Solarcell assembly - Amazon S3 · PDF fileWhatarewedoingtoday? • DSSC$background$(Jackie)$ • Main$components$of$aDSSC$$ • How$aDSSC$works:$where$do$the$e>$go?$ • KineAcs$in$aDSSC:$whatallows$–e

Kinetics  in  a  DSSC:  what  allows  –e  to  move  in  the  direction  we  want?  

DirecAonal  electron  flow  occurs  due  to  kineAcs  of  electron  injecAon  and  recombinaAon  events:  

SWNTS  á  Ame  

Goal:  Fast  green  steps  Slow  red  steps  

SWNTS  â  Ame  

Semi-­‐conductors  á  Ame  

Page 6: M3D4:Solarcell assembly - Amazon S3 · PDF fileWhatarewedoingtoday? • DSSC$background$(Jackie)$ • Main$components$of$aDSSC$$ • How$aDSSC$works:$where$do$the$e>$go?$ • KineAcs$in$aDSSC:$whatallows$–e

PUTTING  THE  SOLAR  CELL  TOGETHER  

Page 7: M3D4:Solarcell assembly - Amazon S3 · PDF fileWhatarewedoingtoday? • DSSC$background$(Jackie)$ • Main$components$of$aDSSC$$ • How$aDSSC$works:$where$do$the$e>$go?$ • KineAcs$in$aDSSC:$whatallows$–e

hWp://www.solaronix.com  

IdenAfying  the  conducAve  side  of  the  TCO  (transparent  conducAve  oxide)  

“Doctor-­‐blading”  the  Atania  (TiO2)  paste  

Page 8: M3D4:Solarcell assembly - Amazon S3 · PDF fileWhatarewedoingtoday? • DSSC$background$(Jackie)$ • Main$components$of$aDSSC$$ • How$aDSSC$works:$where$do$the$e>$go?$ • KineAcs$in$aDSSC:$whatallows$–e

hWp://www.solaronix.com  

Sintering  the  film  (heaAng)  

(1)  Burn  off  polymer  binder  in  paste    to  create  pores  for  the  dye.  (Must  be  in  air)  

(2)  Sinter  nano-­‐parAcles  .    Must  be  in  argon,  here  parAcles  are  connected  in  a  conducAng  network  

Page 9: M3D4:Solarcell assembly - Amazon S3 · PDF fileWhatarewedoingtoday? • DSSC$background$(Jackie)$ • Main$components$of$aDSSC$$ • How$aDSSC$works:$where$do$the$e>$go?$ • KineAcs$in$aDSSC:$whatallows$–e

hWp://www.solaronix.com  Dyeing  the  film  

Page 10: M3D4:Solarcell assembly - Amazon S3 · PDF fileWhatarewedoingtoday? • DSSC$background$(Jackie)$ • Main$components$of$aDSSC$$ • How$aDSSC$works:$where$do$the$e>$go?$ • KineAcs$in$aDSSC:$whatallows$–e

hWp://www.solaronix.com  Assembling  the  device  with  another  electrode  

Filling  the  electrolyte  

Page 11: M3D4:Solarcell assembly - Amazon S3 · PDF fileWhatarewedoingtoday? • DSSC$background$(Jackie)$ • Main$components$of$aDSSC$$ • How$aDSSC$works:$where$do$the$e>$go?$ • KineAcs$in$aDSSC:$whatallows$–e

hWp://www.solaronix.com  

TesAng  the  device