Jpn J Appl Phys 2009, 48:04C187 CrossRef 18 Huang CH, Igarashi M

Jpn J Appl Phys 2009, 48:04C187.CrossRef 18. Huang CH, Igarashi M, Horita S, Takeguchi Salubrinal order M, Uraoka Y, Fuyuki T, Yamashita I, Samukawa S: Novel Si nanodisk fabricated by biotemplate and defect-free neutral beam etching for solar cell application. Jpn J Appl Phys 2010, 49:04DL16.CrossRef 19. Huang CH, Wang XY, Igarashi M, Murayama A, Okada Y, Yamashita I, Samukawa S: Optical absorption characteristic

of highly ordered and dense two-dimensional array of silicon nanodiscs. Nanotechnol 2011, 22:105301.CrossRef 20. Hirano R, Miyamoto S, Yonemoto M, Samukawa S, Sawano K, Shiraki Y, Itoh KM: Room-temperature observation of size effects in photoluminescence of Si 0.8 Ge 0.2 /Si nanocolumns prepared by neutral beam etching. Appl Phys Express 2012, 5:082004.CrossRef 21. Budiman MF, Hu W, Igarashi M, Tsukamoto R, Isoda T, Itoh KM, Yamashita I, Murayama A, Okada Y, Samukawa S: Control of optical bandgap energy and optical absorption coefficient by geometric parameters in sub-10 nm silicon-nanodisc array structure. Nanotechnol 2012, 23:065302.CrossRef 22. Igarashi M, Budiman MF, Pan W, Hu W, Tamura Y, Syazwan ME, Usami N, Samukawa S: Effects of formation of mini-bands in two-dimensional array of silicon nanodisks with SiC interlayer

for quantum dot solar cells. Nanotechnol 2013, 24:015301.CrossRef 23. Kuo DMT, Guo GY, Chang YC: Tunneling current through a quantum dot array. Appl Phys Lett 2001, 79:3851.CrossRef Competing interests The authors declare that they have no competing interests. Authors’ contributions

MI and SS conceived this website and designed the experiment, fabricated the silicon nanodisk samples, performed electrical and optical measurements, analyzed these data, and wrote the paper. MMR and NU fabricated the solar cell structures and analyzed the I-V data. WH performed the theoretical calculations. All authors discussed the results, commented on the manuscript, and read and approved the final version.”
“Background Dye-sensitized solar cells (DSSCs) have attracted considerable attention as a viable alternative to conventional silicon-based photovoltaic cells [1] because of their ZD1839 solubility dmso low-production cost, high conversion efficiency, environmental friendliness, and easy fabrication procedure [2ā€“5]. A typical DSSC is comprised of a nanocrystalline semiconductor (TiO2), an electrolyte with redox couple (I3 āˆ’/Iāˆ’), and a counter electrode (CE) to collect the electrons and catalyze the redox couple regeneration [6]. Extensive researches have been conducted in order for each component to achieve highly efficient DSSCs with a modified TiO2[7], alternative materials [8, 9], and various structures [10ā€“12]. Usually, Pt-coated fluorine-doped tin oxide (FTO) is used as a counter electrode owing to its superior catalytic activity [13]. Selleckchem BI 10773 However, there are researches reporting that Pt corrodes in an electrolyte containing iodide to generate PtI4[14, 15].

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