Patents by Inventor Charles Sturdevant

Charles Sturdevant has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Tandem chalcopyrite-perovskite photovoltaic device
    Patent number: 10290431
    Abstract: Monolithic tandem chalcopyrite-perovskite photovoltaic devices and techniques for formation thereof are provided. In one aspect, a tandem photovoltaic device is provided. The tandem photovoltaic device includes a substrate; a bottom solar cell on the substrate, the bottom solar cell having a first absorber layer that includes a chalcopyrite material; and a top solar cell monolithically integrated with the bottom solar cell, the top solar cell having a second absorber layer that includes a perovskite material. A monolithic tandem photovoltaic device and method of formation thereof are also provided.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: May 14, 2019
    Assignee: International Business Machines Corporation
    Inventors: Supratik Guha, Yun Seog Lee, Charles Sturdevant, Teodor K. Todorov
  • Monolithic Tandem Chalcopyrite-Perovskite Photovoltaic Device
    Publication number: 20170186557
    Abstract: Monolithic tandem chalcopyrite-perovskite photovoltaic devices and techniques for formation thereof are provided. In one aspect, a tandem photovoltaic device is provided. The tandem photovoltaic device includes a substrate; a bottom solar cell on the substrate, the bottom solar cell having a first absorber layer that includes a chalcopyrite material; and a top solar cell monolithically integrated with the bottom solar cell, the top solar cell having a second absorber layer that includes a perovskite material. A monolithic tandem photovoltaic device and method of formation thereof are also provided.
    Type: Application
    Filed: March 13, 2017
    Publication date: June 29, 2017
    Inventors: Supratik Guha, Yun Seog Lee, Charles Sturdevant, Teodor K. Todorov
  • Monolithic tandem chalcopyrite-perovskite photovoltaic device
    Patent number: 9627576
    Abstract: Monolithic tandem chalcopyrite-perovskite photovoltaic devices and techniques for formation thereof are provided. In one aspect, a tandem photovoltaic device is provided. The tandem photovoltaic device includes a substrate; a bottom solar cell on the substrate, the bottom solar cell having a first absorber layer that includes a chalcopyrite material; and a top solar cell monolithically integrated with the bottom solar cell, the top solar cell having a second absorber layer that includes a perovskite material. A monolithic tandem photovoltaic device and method of formation thereof are also provided.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: April 18, 2017
    Assignee: International Business Machines Corporation
    Inventors: Supratik Guha, Yun Seog Lee, Charles Sturdevant, Teodor K. Todorov
  • Monolithic Tandem Chalcopyrite-Perovskite Photovoltaic Device
    Publication number: 20160087233
    Abstract: Monolithic tandem chalcopyrite-perovskite photovoltaic devices and techniques for formation thereof are provided. In one aspect, a tandem photovoltaic device is provided. The tandem photovoltaic device includes a substrate; a bottom solar cell on the substrate, the bottom solar cell having a first absorber layer that includes a chalcopyrite material; and a top solar cell monolithically integrated with the bottom solar cell, the top solar cell having a second absorber layer that includes a perovskite material. A monolithic tandem photovoltaic device and method of formation thereof are also provided.
    Type: Application
    Filed: September 19, 2014
    Publication date: March 24, 2016
    Inventors: Supratik Guha, Yun Seog Lee, Charles Sturdevant, Teodor K. Todorov