02541nas a2200253   4500008004100000022001400041245016400055210006900219260000800288300001400296490000800310520162600318653003101944653002001975653001901995653000802014100002802022700002002050700002002070700002402090700003002114700002102144856012202165       2019                        eng d  a0169-433200aEvolution of ZnO nanostructures as hexagonal disk: Implementation as photoanode material and efficiency enhancement in Al: ZnO based dye sensitized solar cells0 aEvolution of ZnO nanostructures as hexagonal disk Implementation  cMAR  a1130-11380 v4703 a<p>Hexagon shaped pristine and Al doped ZnO nanodisks (NDs) with exposed +/- [0001] polar facets were successfully synthesized using modified sol-gel method without the involvement of any structural directing or capping agents. It was investigated that OH- ions in mixed solvent system is responsible for pore formation and inhibit the growth of ZnO along the direction of c-axis leading to a high percentage exposure of active +/- [0001] polar facets and encourage the formation of ZnO NDs. Crystallographic analysis revealed that crystallite size and lattice constants are decreased, with the addition of Al3+ ions. The results obtained from Raman, and XPS analysis further corroborated with the XRD results, revealed the successful incorporation of Al3+ ions into ZnO lattice. Optical study revealed the band gap tunability with the incorporation of Al ion as dopant. Enhanced power conversion efficiency (PCE) of 1.96% (J(sc) similar to 7.69 +/- 0.23 mA/cm(2)) was observed for Al: ZnO hexagonal NDs based DSSC. The increased PCE in Al: ZnO based DSSC can be attributed to the higher inner surface area for dye anchoring by the interconnected network of the disk-like structure. The obtained results were satisfactory and most importantly the synthesis procedure proposed in present work is excellent for the synthesis of perfectly hexagonal shaped disks under precised synthesis parameters. The device interface study was further conducted using electrochemical impedance spectroscopy which revealed better charge transport process and charge storage ability with the incorporation of Al3+ ions into ZnO lattice.</p>10adye sensitized solar cells10aHexagonal disks10aSol-gel method10aZnO1 aParra, Mohammad, Ramzan1 aPandey, Padmini1 aSiddiqui, Hafsa1 aSudhakar, Vediappan1 aKrishnamoorthy, Kothandam1 aHaque, Fozia, Z.  uhttps://library.ncl.res.in/content/evolution-zno-nanostructures-hexagonal-disk-implementation-photoanode-material-and02140nas a2200313   4500008004100000022001400041245013500055210006900190260000900259300001600268490000700284520108400291653001901375653004001394653002201434653001901456653001601475100001701491700002501508700001401533700001801547700001601565700002001581700003101601700002301632700002301655700002501678856012301703       2021                        eng d  a1433-785100aOrganic-inorganic perovskitoid with zwitterion cysteamine linker and its crystal-crystal transformation to ruddlesden-popper phase0 aOrganicinorganic perovskitoid with zwitterion cysteamine linker   cAUG   a18750-187600 v603 aWe demonstrate synthesis of a new low-D hybrid perovskitoid (a perovskite-like hybrid halide structure, yellow crystals, P21/n space group) using zwitterion cysteamine (2-aminoethanethiol) linker, and its remarkable molecular diffusion-controlled crystal-to-crystal transformation to Ruddlesden-Popper phase (Red crystals, Pnma space group). Our stable intermediate perovskitoid distinctly differs from all previous reports by way of a unique staggered arrangement of holes in the puckered 2D configuration with a face-sharing connection between the corrugated-1D double chains. The PL intensity for the yellow phase is 5 orders higher as compared to the red phase and the corresponding average lifetime is also fairly long (143 ns). First principles DFT calculations conform very well with the experimental band gap data. We demonstrate applicability of the new perovskitoid yellow phase as an excellent active layer in a self-powered photodetector and for selective detection of Ni2+ via On-Off-On photoluminescence (PL) based on its composite with few-layer black phosphorous.10aCrystal growth10aorganic-inorganic hybrid composites10aperovskite phases10aphotodetectors10azwitterions1 aKour, Prachi1 aReddy, Mallu, Chenna1 aPal, Shiv1 aSidhik, Siraj1 aDas, Tisita1 aPandey, Padmini1 aMukherjee, Shatabdi, Porel1 aChakraborty, Sudip1 aMohite, Aditya, D.1 aOgale, Satishchandra  uhttps://library.ncl.res.in/content/organic-inorganic-perovskitoid-zwitterion-cysteamine-linker-and-its-crystal-crystal