An interesting article on an new sensor: "to double the light-input surface area of each pixel"
Organic-on-silicon complementary metal–oxide–semiconductor colour image sensors
http://www.nature.com/srep/2015/150112/srep07708/pdf/srep07708.pdf
Organic-on-silicon complementary metal–oxide–semiconductor colour image sensors
http://www.nature.com/srep/2015/150112/srep07708/pdf/srep07708.pdf