NASA Technical Reports Server (NTRS) 20050052018: Nanotube/Quantum Dot-Polymer Solar Cells

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Are 1.
Nanotube/Quantumn Dot-Polymer Solar Cells

Shelia Gi. Baileyieaueesponding author", Ryne P. Radtaele®, Brian J, Landi’ amd Stephanie 1. Castro

levehund, CHE ALLIS, LISA atone
icila G Bailey @inasn gov

433-2228

*NanaPovrer Research Laboratories, Rachoster ntilans af Technology, Rochester, NY 74623, USA

JOmin Aerospace Fnatinte, Biaokonrk, OH 44242, USA.

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Nanotabe/Quantau Dot-Polpiner Solar Cells Abstract

rec used for this shady were syihesized sng the pulse laser vaprivation
SWNTS were collected fom the condensed cepion avi the quinls Whe
sue tae finnaze aad posifiot by anadificaser previously reported precedue, Preperation of
the SWNT-P3OT vompostic solutions was pertormed using a series OF mixing and somivntion stops 85

previously detwaastarel fer stier SWNT-palyme: spsoms, Device fabrication involved the wie of
commeseia!ly obtained, bs y fie, #10 Wisq,) [TO-cortod aolysdlytenc taraprhalaus (PIS

strates, lately, ax inrinsis layer of p 207 opucted C12 mb af be 1S agin

‘Gea of the substrate, This Is Toflawed with sgray deposition of
st similar volumes. As seed in Hipwe 1, complation ofthe seiar
cemntacts (ypicat thicknesses of 19008) are applied mo the 2G snd SWNT

507 compusive lm lyers.

To horsoyersous distibviien saatris is depender( apon the willy of the
polyme: chuin te usinciate with the SWNT sopensustere, Stable compesie diapersious of 0.4 ead
1.3% sein WNT Sa POT were produced an amilyzed Sn this siady, Optical specuoscoay was
vondueted 19 obsarve tho SWINT doping level eftecis on the absorption pr: fer potential
see mime toon Gass lps Shown a Hee 2 wey fi pe

tien af Uae BWNT

el Bes xyes, il jy possible
fn fact, at these relatively low doping levels, the POT shows 3
typiea! earsples patern

the absumption

SUNT ig oflset ftv the alber Ahr
‘ooserved for this speceal songe.

Application of SRNT-PIOF composite solutions te the constructed devices was sorfeened usig a
solbtion-spriy ‘echaigue onto the TTOPET substrutes, These novel polymeric solar sells were
‘ceeusteucied fur pristine PSO, @.1% whe, and LO% wie SWNTs in PIO, an tested under vimuloaed
AO ilursination to vetermine the respective |-V characeristies, The lypical photorempouse ubserved

cin: PSOT and Ie wwe SWITE-Z3OT calle is dhoun in Five 3. Although cach overlay shows
ia bot Te, and Vay URO0 ilfumination, there is an absence of the ‘ypieal diode
“ave” for Both cases. Phe exute tthe larger thaw expo er avery use

may ac amailsted,

canter traps which reluees the Fe,

Turdier churcoleration of the campsite celle showed g cerraspending incrense
level af SWNIs ineccased in the PI0T. Figure 4 shows an -V wverlay
the prissee F3CY, 0.1%, and 1.9% whe SWNT-P30C cells in fae region of
Fesward bins, Clearly evident is an order of maguimide ineresse in the i, from the pristine PT to the
-P3QT conspcaite coll, An ssitionnl increase of 50% is observed wlaen the deping
the vefl, This ena! iecuulep Ghat ere is

in fhe be as the
let the Stimulated

Aid dofoet density af the SWI,

Car approach maximizing the charge sepunaion ana wurrier seaport in SWNT-doped P3OT sets

‘x through sciacbnet of eavalent semnivonducsng qauuctum Bots to Ihe SWYTR {see Bigure 5x). Shown,

in Figere 6b is 9 tapping-mode atoe foree micvograph (AEM) of oat resulting CASe-en-SWNT

smplsnad ean ryamation of this melevial rata similer P3OT composite soles cells 43 desexited
re, is currently under investigator.
Raptanacacy Page ¥

SWNT-dopod P30T.
PolyS Ociyi-ti ie
Teer eee
Sothalain CEU.

of Saiaiveied SHUNT.

Wisotense lath

igure 2, Optical shvomtion overlay far thin films of pristine PAOT (black), 0.19 ww SWRT-P3O
¢ (bine), snd purified SUN Te (gray), kahncers
i absoxption Fac ehe composites relative to the pristine POV is clear!y observed

votage 00

Biguve3. Cherri UV Bs ithe dak ary and nde smite AM aaninton (ek,
yin th petrespone rf pss 950% nd) Ta wee SWAE-DSOE coupes soma als
xplanatsry Page z

Yotage 0)

Fiyuve 4. Gveriey ofthe iV reionatip are sults 2
ste Coach dashed), wad 1.095 wits SWHT-PSOT
wolut eels

MG lamin i for pristine POT (ary
sponte Colac: Us

he approach n conjayete qantas dots with SBNTs prir to
eof CaSo-un-SWNTs to be used as dont it
OP sal

igure 5. {a} Sohiomsatic zeprcaentat
disperon in due canducting polyzzer; eb) AE
fi SNE