1. Lehigh University, Center for Photonics and Nanoelectronics, Department of Electrical and Computer Engineering, Bethlehem, Pennsylvania 18015, United States
2. Universidad Autónoma de Madrid, Departamento de Física Aplicada, Cantoblanco, Madrid 28049, Spain
3. University of Campinas, Laboratório de Nanotecnologia e Energia Solar, Campinas-SP 13083970, Brazil
4. Rutgers University, Department of Materials Science and Engineering, Department of Chemistry and Chemical Biology and IAMDN, Piscataway, New Jersey 08854, United States
5. Surface Chemistry Branch, Code 6170, Naval Research Laboratory, Washington, DC 20375, United States
6. University of St Andrews, Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, St. Andrews, Fife KY16 9SS, United Kingdom
7. North Carolina State University, Department of Materials Science and Engineering, Raleigh, North Carolina 27695, United States
8. General Electric–Global Research Center, Electrical Technologies and Systems, Micro and Nano Structures Technologies, Photonics Laboratory, Niskayuna, New York 12309, United States