(19)
(11) EP 0 212 581 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.09.1988 Bulletin 1988/39

(43) Date of publication A2:
04.03.1987 Bulletin 1987/10

(21) Application number: 86111267

(22) Date of filing: 14.08.1986
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI LU NL SE

(30) Priority: 26.08.1985 US 769106

(71) Applicant: ENERGY CONVERSION DEVICES, INC.
 ()

(72) Inventors:
  • Johncock, Annette
     ()
  • Hudgens, Stephen J.
     ()

   


(54) Improved enhancement layer for electrophotographic devices and method for decreasing charge fatigue through the use of said layer


(57) An improved enhancement layer (18) operatively disposed between the top protective layer (19) and the photoconductive layer (16) of an electrophotographic device (10). The enhancement layer (18) is specifically tailored from a semicondcutor alloy material designed to substantially prevent charge carriers from being caught in deep midgap traps as said carriers move toward the surface of the elec- trophotogrpahic device (10) from the photoconductive layer (16) thereof. A method of substantially improving charge fatigue characteristics through the use of such an improved enhancement layer (18) is also disclosed.






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