Patent ID: 7435310
Filing Date: 2008-10-14
Classification: B29C,B82Y,H01L,Y02E,Y10S,Y10T

Abstract:
1. A method of making films surface imprinted with nanometer-sized particles to produce micro- and/or nano-structured electron and hole collecting interfaces, comprising: (a) providing first and second substrates; (b) providing a photoabsorbing conjugated polymer; (c) providing a sufficient amount of said nanometer-sized particles to produce a charge separation interface; (d) providing a transparent polymerizable layer including a sol-gel or monomer; (e) embedding said nanometer-sized particles in said conjugated polymer to form a conjugated polymer nanometer-sized particle mixture; (f) applying said polymerizable layer on said first substrate to form a charge transport film layer; (g) applying said conjugated polymer nanometer-sized particle mixture on said second substrate to form a nanometer-sized particles bearing surface film layer, wherein said nanometer-sized particles form a stamp surface; (h) imprinting said stamp surface into the surface of said polymerizable film layer to produce nano-structured electron and hole collecting interfaces; (i) polymerizing said polymerizable film layer to promote shrinkage to form a conformal gap between said stamp surface and the surface of said polymerizable film layer; (j) filling said gap with a photoabsorbing material to promote the generation of photoexcited electrons within said conformal gap and transport of said photoexcited electrons to the charge separation interface; and (k) said conformal gap having a uniform width along the entire length of said conformal gap, the uniform width of said conformal gap being within a range of 60 nanometers to 100 nanometers to insure sufficient generation of electrical current resulting from an excitation of said photoexcited electrons within said photoabsorbing material.