▎ 摘　　要

NOVELTY - The detector (10) has a first graphene element (12) that is provided with few layer graphene element functionally doped with a dopant material and to which electrode is connected. The second graphene element (16) is adjacent the first graphene element and forming an interface. The graphene elements comprises a pristine graphene element dopant material comprises iron chloride, copper chloride, organic molecules including as rubrene and pentacene, lithium, potassium and zinc oxide. USE - Photo detector used in digital still and video camera, solar panel and sensors. ADVANTAGE - The photodetector makes use of two graphene elements located one upon the other, rather than a single graphene element used in conjunction with a metal element. Hence the photodetector can be of enhanced optical transparency. The photodetector can be of enhanced flexibility and can be able to be stretched, and the characteristics of the graphene elements no longer constrained by the presence of adjacent metallic elements. The photodetector can be able to be used over an increased range of temperatures compared to a photodetector in which metallic elements are present as graphene remains stable over an increased temperature range. The all graphene photovoltaic devices outlined can be able to harvest energy over the entire sun light spectrum. The leap to all-graphene structures can enable the development of a new generation of transparent photovoltaic devices which do not suffer from haze or in which haze is significantly reduced. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the photodetector. Photo detector (10) Graphene element (12,16) Electric contacts (18,20)