01850nas a2200241   4500008004100000022001400041245009900055210006900154260000900223300001400232490000800246520101600254100001601270700001801286700002201304700002901326700002001355700002201375700003001397700002201427700003001449856012901479       2017                        eng d  a1932-744700aEfficient organic photovoltaics with improved charge extraction and high short-circuit current0 aEfficient organic photovoltaics with improved charge extraction   cMAR   a5523-55300 v1213 a<p>Exciton generation, dissociation, free carrier transport, and charge extraction play an important role in the short-circuit current (J(sc)) and power conversion efficiency of an organic bulk heterojunction (BHJ) solar cell (SC). Here we study the impact of band offset at the interfacial layer and the morphology of active layer on the extraction of free carriers. The effects are evaluated on an inverted BHJ SC using zinc oxide (ZnO) as a buffer layer, prepared via two different methods: ZnO nanoparticle dispersed in mixed solvents (ZnO A) and sol-gel method (ZnO B). The device with ZnO A buffer layer improves the charge extraction and J(sc),. The improvement is due to the better band offset and morphology of the blend near the ZnO A/active layer interface. Further, the numerical analysis of current-voltage characteristics illustrates that the morphology at the ZnO A/active layer interface has a more dominant role in improving the performance of the organic photovoltaic than the band offset.</p>1 aMohan, Minu1 aNandal, Vikas1 aParamadam, Sanish1 aReddy, Kasala, Prabhakar1 aRamkumar, Sekar1 aAgarwal, Sumanshu1 aGopinath, Chinnakonda, S.1 aNair, Pradeep, R.1 aNamboothiry, Manoj, A. G.  uhttps://library.ncl.res.in/content/efficient-organic-photovoltaics-improved-charge-extraction-and-high-short-circuit-current