01583nas a2200157   4500008004100000245011200041210006900153260000800222300002700230490000600257520096100263100002001224700003001244700002401274856012701298       2017                        eng d00aIncreasing light coupling in a photovoltaic film by tuning nanoparticle shape with substrate surface energy0 aIncreasing light coupling in a photovoltaic film by tuning nanop  cAUG  aArticle Number: 0850220 v43 aTuning metal nanoparticle (MNP) contact angle on the surface it is formed can help maximise the useful optical coupling in photovoltaic films by localized surface plasmon (LSP) resonance-opening up the possibility of building improved photovoltaic cells. In this work experimental demonstration of optical absorption increase in copper phthalocyanine (CuPc) films by tuning silver MNP shape by changing its contact angles with substrate has been reported. Thin films of poly3,4 ethylenedioxythiophene: sodium dodecycl sulphate (PEDOT: SDS) with different surface energies were formed on indium tin oxide (ITO) coated glass by electro-deposition. Silver MNPs thermally evaporated directly on ozonised ITO as well as on the PEDOT: SDS films showed contact angles ranging from 60 degrees to 125 degrees. The CuPc layer was deposited on top of the MNPs. For the samples studied, best optical absorption in the CuPc layer was for a contact angle of 110 degrees.1 aKataria, Devika1 aKrishnamoorthy, Kothandam1 aIyer, Sundar, Kumar  uhttps://library.ncl.res.in/content/increasing-light-coupling-photovoltaic-film-tuning-nanoparticle-shape-substrate-surface