Organic film photovoltaic cell

ITO/TPD/Gd(DBM)

3

bath/Mg:Ag

was fabricated. The TPD

N

N’-diphenyl-N

N’bis(3-methylphenyl)-1

1’-diphenyl-4

4’-diamine

and Gd(DBM)

3

bath

gadolinium (dibenzoylmethanato)

3

(bathophenanthroline)

are the electron acceptor and donor

respectively. Fabrication process is indicated shortly. Although TPD acts as an active layer in the bilayered cells

insertion of a Gd-complex film between TPD and the alloy cathode is necessary for efficient carrier photogeneration. Under the irradiation of 365nm UV light with 4mW/cm

2

the cell shows short-circuit current of 29.24μA/cm

2

open-circuit voltage of 3.2V

fill factor of 0.286 and external quantum efficiency of 2.73

respectively. And the spectral response region of EQE is matched to the absorption spectrum of TPD film

suggestingt hat it’s the absorption of TPD layer but not that of the Gd(DBM)

3

bath plays a dominant role in the creation of photovoltaic. We also demonstrated the rela tions hip between photovoltaic phenomena and exciplex

[TPD

+

...Gd(DBM)

3

bath

-

]

*

which generated at the interface between TPD and Gd(DBM)

3

bath layers. And we can say that in the photovoltaic progress the exciplex [TPD

+

...Gd(DBM)

3

bath

-

]

*

acts as a hole-electron pair

or in other words

acts as light-generated exciton.