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on sol–gel deposited Zr doped ZnO films. Mater Chem Phys 2003, 79:71.CrossRef Competing interests The authors declare that they have no competing interests. Authors’ contributions The experiment was designed by ZYY and HLL and revised by QQS, SJD, and DWZ. The fabrication of TZO films was carried by ZYY and YG. The characteristics of the films were tested and analyzed by ZYY with the help from YG, YZG, ZYX, and YZ. ZYY prepared the manuscript, Everolimus and HLL gave a lot of help with the draft editing. All of the authors have read and approved the final manuscript.”
“Background The quest and demand for clean and economical energy sources have increased the interest in the development of solar applications. In particular,
direct conversion of solar energy to electrical energy using photovoltaic cells has attracted much attention for several decades [1–4]. Among various photovoltaic cells, organic polymer-based solar cells have received considerable attention as a new alternative ROS1 photovoltaic technology due to their flexibility, light weight, low-cost fabrication, and easy integration into a wide variety of devices [5]. Importantly, bulk heterojunction (BHJ) solar cells based on intimate blends of organic polymer as the donor and inorganic nanomaterials as the acceptor are currently attracting increasingly widespread scientific and technological interests because of the advantages, resulting from these two types of materials, such as low cost, outstanding chemical and physical properties, easy preparation from organic polymers, high electron mobility, excellent chemical and physical stabilities, size tunability, and complementary light absorption from inorganic semiconductors [6–8].