Patent ID: 9166183
Filing Date: 2015-10-20
Classification: H01L,Y02E,Y02P

Abstract:
1. An organic solar cell comprising: a metal electrode as an anode and a transparent electrode as a cathode that are arranged to face each other; a photoactive layer that is disposed between the anode and the cathode and contains a mixture of poly-3-hexylthiphene (P3HT) as a hole acceptor and (6,6)-phenyl-C61-butyric acid methyl ester (PCBM) as an electron acceptor; a hole transport layer that is disposed between the cathode and the photoactive layer and contains a mixture of poly(3,4-ethylenedioxythiophene) (PEDOT) and poly(styrene sulfonate) (PSS); and a metal oxide nano thin film layer that is disposed between the cathode and the hole transport layer and contains a metal oxide having an average particle size of 3 to 7 nm, wherein the metal oxide nano thin film layer has a thickness of 50 nm to 500 nm, wherein the metal oxide has a particle size distribution such that 90% by number or more of the particles relative to the total number of the metal oxide particles have a particle size in the range of ±4 nm with respect to the average particle size, and wherein the metal oxide nano thin film layer is in direct physical contact with the cathode and the hole transport layer.