Power Dependence and Turn-On Dynamics of Polymer Photocells - Extracting Mobilities and Analyzing Morphologies

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Power Dependence and Turn- on Dy

nam

i cs

of

Pol y

m

er Ph

I5.10.1

ot ocel l s



E

x

t ract i ng

M

ob

i l i t i es

Noam Rappaport and Nir Tessler E

A

lec tric al E

ng ineering

B

T

S

W

TR

A

C

F

e present an analy tic

ac u

lty ,

Tec h

nion I srael I nstitu

desc ription f or th

e loss of

intensities and demonstrate a simple tec h semic ondu

c ting

drif t- rec omb ph

otoc u

M

E ph

H

ination sc h

rrent q

- P

P

otoc u

V

poly mer lay ers.

.

u

Th

antu

rrent and th

e time ev

th

e resu

th

eoretic al and ex

in redu

I N

TR

E

olu

c ing

O

( w

ith

eq

u

w

a b

al,

TI O

ell.

A

t low

ph

as th

h

elec trons.

c u

O

u

lts ob

rrent tu

Th

f or th

antu

dy

e link

les th

tained in th

produ

I nstead of

u

lts w

c h

arac teriz ed b

ex

plains th

y

ith

en u

th ex

e mob

e measu

aif a,

at moderate lig h

ility w

h

of

ic h

sed to desc rib

e role of

t

elec trons in is b

ased on a simple

red intensity

e th

e sw

itc h

ole c onc entrations inside th

ss th

I srael.

dependent

trac tion is demonstrated f or pristine

rrent transient w

to disc u

th

eoretic al analy sis,

ility

H

rrent ef f ic ienc y

trac ting

dependenc e measu

c ting

on of

e dev

th

ic e.

e f ind an independent v

rements.

rec omb

W

e u

se th

e

B

y

analy z ing

erif ic ation f or

e c omb

ination of

ination and spac e c h

A

t h

ig h

poly mer lay ers are ty pic ally

lating ou



( Q

ed to th

lts th

E

)

e h

e dispersiv

e natu

re of

so do th

arg e ef f ec ts

ou

g h

av

th

e h

C

L

)

ing

th

th

h

ic h

e ph

ere analy z ed.

h

ow u

ilib

er, riu

th

e intensity

e spac e c h ility .

at w

arg e ( S

C

h )

Th

e mob

e tu

ility

m dispersiv

w

ay s of

A

t th

ic h

th

c u

w

a w

as f ou

ith

h

ereb

dif f erent mob

y

th

A

e

e

c onf irm th h ex

ereb

y

th

ility

v

alu

plain th

e

in poly mer lay er is Th

e transport f rom a spatial domain point of

is approac h v

iew

.

e e

c itation

etter def ined.

eories to ex e th

en

e ef f ic ienc y

at low

e b

t

t a g iv

is point th

ell def ined mob

ilities.

lig h

o inter- related

rements w

nd to b

e transport th w

rrents are

rrent f or th

rn- on dy namic s,

de ic es

e lay er as

rrent w

I n order to independently

at dif f erent approac h

parallel path

arg e th

otoc u

ination.

lt to analy z e in terms of ev

c h

c arrier c onc entrations.

and rec omb Th

mag nitu

t detec tor dev

ole and elec tron c u

e perf ormed transient analy sis measu

ere dif f ic u

th

eral orders of

e c arrier c onc entrations and tw

elec tron mob

ic e w

e propose a somew tion of

alth

sev

otoc ell or lig h

e lay er is elec trons w

starts to dec line.

er intensities h

u

at in ph

pec t a linear inc rease of

e term desc rib

e dev

at w

oles) ,

arg e limit ( S

trac tion of

th

is is th

ination is insig nif ic ant at low

spac e c h

e ex

h

th

e ac tiv

ld ex

time domain non- eq

a distrib

th

is inc reased,

is manner w

c ed resu

t