Table Of ContentAERI-SB-AR-TR-OS-
REPORT DOCUMENTATION PAGE |
ore5 x
ieveoos—spiance
“ Pager
iegvated Instrumentulion System for the Surface
Characterization of Orgaule Electromie Materials and Devices
‘yang Yam, Poker, Malaale Sino ane Ene nseig, SLA
FER EATERY WD ATS TRACHEA
{ae Angee cAStnOS
RN OCC AERST WAST AD STORES) TENSE
bbe charles Lot Srevanvont Snr
Air ome Cio f Sooo Reseirsh
4013 Wien Bhs, tonn 713
‘Arliogta, Wa 27208-1954,
Pages Tareumublibedresuks, Approve for Public Reles
sores dicted
TAT EA ST
be AFOSR DUREP gan: as belped us to sch hacer mt-chnigue (UPS and XPS) sore ras syst,
pivchased fro Cniferm Nuon: Techuclogy, Tis isthe ruost important equipment we bave obtained in recent
SJeus. This instrument ulluws 1s ¢0 measure Ullasioket Pbotncleuisen Spectroscopy (UPS) and Xeray
Photoelectron Spectoscopy (XPS), which ave indeed the Firs such sysuemt at CCLA carpus. The
Snstrnnentatien ssa insttled in Min, 2004, and fly operational iw July. Some Luporiant esuts have
repshied from this rnin even for Hs shoot operation time. These gesale arc reports in.che sper in deta
oa NES
al
bela, -
tinal Performance Report
Dr. Churles Lee
Air Vorce Office of Sciealific Research
{4015 Wilson Blvd, Room 713
Avlingtum, VA 22203-1954
‘Talegeated [astrumentation System for the
Surface Characterizatou of Organic Eilcetronic Materials and Devices
DISTRIBUTIONSTATEMENTA
Approved for Public Release
Distribution Unlimited
Rrepared by
Prof, Yang Vang
‘epartment of Materials Science nad Engineering
UCLA
Los Angeles, CA 90095.
“Tel (310) B2S-4052
Fas: (310) 206-7353
e-mail: yonev@uela eda
20050325 126
‘This AKOSK DURIP grant has siguifcertly helped UCLA in soveral aspects and
stem et UCLA, and
projects. Prom the equipatent point of view, tis isthe st sample
‘whole campus as already bestefitd feom this instrument remenlously, (Please see the auached
lemters atthe end of this report.) From the resesrel point of viow, several projects on orgamie
elecinwic malesials and devices, such at organic photovoluie device, polymer lightening
‘devices, and organi bistable devioes ete, Reve already taken the advantage fram chs piece oF
instrument, ‘Tho instrument was shipped to UCLA in ently May, 210 and 0s installed and
tested in Jute, ft beete filly operational in July, afr some debugpiny process
1, System introduction
A. doal-chamaber rad-techniqus sucace
nalysls aysters Was purchased fon Onision
‘NowoTechnology. This & the most important
equipment we have abtalned in regent pus. Tas
lustument lows ust measure Ultrvinle
Paoluelecran Spectoscory (UPS) and Ky
Photoelectron Specirascopy (XPS)
“The system bas vo ultastigt vacuum
humbers and the vacwom in both the chambers
| Dunl-chanber mut-technique surfice
can enh 1A x 10" ear, Fig, | she overall sale aston
view of the system, The vacnum is achieved by 10 rotary
pumps, fwo fom getter purpps an ra titanium sublimation
amps
Aawlysis chaniber (ig, 2) is the main part athe
system, TL contaits monocharaotie X-ray source, Nigh
density UV sour, and bemisgherisd electron
specteometer for XPS PS mesutement, It also has ald
ig. 2 Analysis chamber of the system
‘erthode spulter fon source fo clear. substrates ur decrease the thickuess of thin films. An electron
‘beam source is also insta to neuzliae the postive charge when the ooudectivity af the sample
is insufiient tu discharge the somple during the XPSIUPS messorement, The eesolution of the
[XPS is 0.GeV andthe muni count ate is 22ketWsec, The reselution for UPS is abut 0.10
sad the maximum couat rate is 7.7Mctssee. The position of sample hnlder ow te manipulator ip
analysis chamber is comlled by fur step motors that make juan v
it consenicat foe saapte ransfer aru measurement,
Hot XPSITIPS meusurement, J¢ is important to have
“nailu” soeaple preparation capability tw avoid unnecessary
concamination, Out system is equipped with 2 sumsle
preparation chamber to deposit metal andor organi fils in
‘the same vacuura couitian, Preparation chamber (Fig. 3) has
wo evapoistion somces. One fs thermally heared Knudson
cell for organi mutes, ahd anorsr one is electron-beam
eared saree for me‘al
Fig. 3 Preparation chamber
The power supplies and controler Cor all the
electrics instroment, vacuum gages ciller tv eaalng the K-ray and LIV sone, conacllem for
‘puonmatic valves, et. are install in ts electra! racks, (Fg, 4)"The mensurement of XPS/UPS,
FF, iscentelled hy a PC wih The special software (ETS } frum
1
mieten
2, Experiments results
Tn the prosess to cain ourselves und fumilieize
map wiht XPSILPS, wo invited Prof Yougli Geo from
Department ef Physies & Astronomy st University of
Rochester to our laboratnry for one sweck, Te is a would
fimeus physicist on experimental surfave _plysien
leetenie imeractions und mumpholaey of ibterfiees and
‘nesfaceforzation, ransient hchavior of charue easter
Fig. 4 Election racks and PC:
seross interfaces, and interfaces in organic semiconductor devives, He has helped us v0 dus fone
she system tots best performance.
‘We bave slready obtained nese very imporlan cults, even though We syst hus been up
and running omly for afew months, Mere ato some examples:
(1) entiation of and so deniticatan ca joint work wih Pe. Wel)
Carbon of the sp-ype (able to roke one duble bond with auothar at) is reaponsible
boodh for the igh conductivity and amaticr
bandaag (back color) of graphite and forthe wy
fis arvanged in layers. Ths, in turn, azcounns for
the lubrication and thor cAemical ard physical
properties of graphite, Benasae is alsa ap?
lybridized, We ai
work with Prof, Feed Wall at Choatistcy &
seme exvsperatia on this
Biochemisky Mepaiment of UCLA. They
syathesized some new material (HCEPESE) and
‘we identified the carboa type ofthe material
(On he other hand, the sp carbons (all single
lands) are what male diamond, an, insulating
teanspatans, und very hard material, The bes kind
of carbon Iybedization, sp (or “sp, one wpe
lvand ur sr double bonds at the stme stom,
swovld make acolylene. Fram those preliminary
‘nda Enrane)
Tig, 5, Cis XPS speottum of |
polvethviens, graphite and HCCPLSB.
experiments, IC was knovay thar the mateiat ts mostly composed of sp? carbon, which wuld
explain, amamg other things, ts dackoolot. Tn Fig, 5. XPS spestrum af ets shows thet the eatbon i
TICCPISB is move like the carbne im graphile nuker dian carbon in polyethylene. We kame that
the carbon in graphite and poiyethylene is sp? and op? styl, respectively. This is te reason that
HECCPISH shows gnod conductivity
(2) Chango ransfr in Au-nanepacticle
a is poki-nais pastie.e
2epents Clg
Svea s¥ 8 1403.2 08
2epeaks fining
Stoo ev 2 1402.6
° © givetic Boerar (eV)
Tig. 6 XPS spectea of An 4a pure gold film and Au-nanupurtie‘es
actos
Tig. 7XPS sects of Ns in pn palvaniline (a) ard compesite a Au and puyuniline (6)
‘We also investigated the charge transfer between polvoniine and Au nanc-patiles. Fig. 6
{is the results abluined Sno XPSHUPS system and me cam sep that the XPS Au 4€ spocta ee
Uifecert in pure geld film and in Av-vanopantcles, which means Au in Aussnoparticle hus ame
charge transferor chemical reacton With offer clerenis. The Au Cin Au-uanopacticle salts by
(0.2eV to high Kinetic energy (low binding energy? Tig, 7 is the XPS N1e spect of pure
polyauilize and of the Au and pulyniine composite, The Ns iz palyuniline & a two-pesk
strusture (there are ‘wo chemical states of Nitrogen in pnlyarifin}, uke position of the poaks ate
1087. 19e¥ and 1088.452¥, while the N Is ie Au-polyanne composite caznt be docompme 10
‘ovo peas, the peak position is 1086.6ScV. Ue N 1s shifts at lus! 0eV wo low kinatis enctey
comparing with the Nitrogen in polyaniline. Ae 4f and N 1s shit to oppastte direction, so there Is
Thum vovedinate bond, These sssuks
some charge transfer between gold aut Nitrogen atoms, th
van help so understand she ruschantam of cur plymer sys
Summary:
Uhis XPSAZPS system has help UCLA to enhunce its research eapabiliy and taining sudents
\We locke forward tn produutive resis Gon this instcumentation. Several professors whe was the
Initia eats trom this machine have provided their supporting Leer atthe end of his report,
ERWERSITY CSR ARRNT4, LOS ANCLUS vet
‘August 38,5008
Di Clatea tae
STORRS
Ds Wor od soe
Angin, VASE
DeieDe Lee
Sanu slg ate the er Torco eae Rezar forces fhe
autor prtmrceroealy send Tots Yang Yang arian, Ths
Earercny a Ursspnnur inzaicay pron obese hpag sae see
Irate ply tpn mn i
‘Esa st Bat Yangand he erent Me face devel naied fr grog,
‘nha aie waaay py nai sd dasa he ibe th po
Tanosatclesef tent intone Cringe iene natealnca dil Enews no
‘Beeuodes Peonswr eng’: gong hee dears ceramic so eet
five pestoren onde uf gdade denen conor ty ea Deon ano ee.
Raa quetus wales lhe hare ofeheepestrsge, Using he OMICRON KPA! IES
Spoor lad no ase han nom date eld nanopcteaea ener
“Tostbey creed and the eehupsnan te pepantne hs bevose pasely arses TH
stdeater ha Le schon nee caebeerlar end nbeping eke apld procs
{plapettent cen: Crone A25/ UPS neal, Snes ploeag ak porte rin
Sheet sd iho wi caer tempat tend
Span
Sweety
cae
Fi ger
Reet fey
Sere Se eta
UNIVERMELY OF CALIFORNIA, LOS ANGELES
Anpust 17,2004
br Carlee Lew
ABOSRINL,
41S Wilken five, Roma !13,
‘Anington, VA 22003-1554
Dear De Lee,
express my nas (av) fr raf. Yeng'e OMICRON XPSIUPS,
fea sanchrd XPS utes, bis wis carpe preention allow un there
‘vannrate organic moloules usta a biclogical fasts J aye pte plas toute hi ayaa
nd ook forwerda working with Pret Yung to devel dh capac. Phase eal ei yar
appre e1y more dais ori yew have any questions.
Sincarly,
ee Bap
Den Wu, DDR.PED
‘View Cit, Departenent af Bioengieceing
