• Ardiani, Irma S.
• Fauzi, Angga D.
• Nadiyah, Khoirotun
• Priyanto, Budhi
• Baqiya, Malik A.
• Tunmee, Sarayut
• Laila, Anna Z.
• Prayogi, Soni
• Darminto, D.
• Rusydi, Andrivo
• Asih, Retno
• Diao, Caozheng
• Nakajima, Hideki

Abstract

<jats:title>Abstract</jats:title><jats:p>An understanding on roles of excitons and plasmons is important in excitonic solar cells and photovoltaic (PV) technologies. Here, we produce new amorphous carbon (<jats:italic>a</jats:italic>-C) <jats:italic>like</jats:italic> films on Indium Tin Oxide (ITO) generating PV cells with efficiency three order of magnitude higher than the existing biomass-derived <jats:italic>a</jats:italic>-C. The amorphous carbon films are prepared from the bioproduct of palmyra sap with a simple, environmentally friendly, and highly reproducible method. Using spectroscopic ellipsometry, we measure simultaneously complex dielectric function, loss function as well as reflectivity and reveal coexistence of many-body resonant excitons and correlated-plasmons occurring due to strong electronic correlations. X-ray absorption and photoemission spectroscopies show the nature of electron and hole in defining the energy of the excitons and plasmons as a function of N or B doping. Our result shows new <jats:italic>a</jats:italic>-C <jats:italic>like</jats:italic> films and the importance of the coupling of resonant excitons and correlated plasmons in determining efficiency of photovoltaic devices.</jats:p>

Topics

• impedance spectroscopy
• amorphous
• Carbon
• ellipsometry
• tin
• Indium