1. Department of Materials Science, Università di Milano-Bicocca, via Cozzi 53, 20125, Milano, Italy, Department of Chemistry and the Argonne-Northwestern Solar Energy Research Center, Northwestern University, Evanston, Illinois 60208, Polyera Corporation, 8045 Lamon Avenue Skokie, Illinois 60077, Department of Civil and Environment Engineering, Università di Perugia, NIPLAB-INSTM, Via Pentima Bassa 21, 05100 Terni, Italy