Waseda University

Sino-japan Electric Heater Co., Ltd.

Rongbin Xie

Suguru Noda

Provided is a conductive material that is capable of achieving a high-electric conductivity, long-term stability under an atmospheric environment, heat and humidity stabilities, as well as a conductive film and a solar cell using the same. The conductive material includes a mixture of carbon nanotubes (CNTs) and polystyrene sulfonic acid (PSS acid). The element ratio (S/C ratio) of sulfur (S) to carbon (C) in the mixture may be from 0.001 to 0.1 in terms of the number of atoms. CNTs and PSS acid may make up a content percentage of 10 wt % or more in the mixture. These conductive films comprised of the conductive materialmay have a weight per unit area of the CNTs in the range from 1 mg/mto 10000 mg/m. The solar cell may include the conductive film, wherein the film is on the surface of a semiconductor.

Growing community of inventors

Tokyo, Japan

Rongbin Xie