The present study focused on low temperature synthesis of Mn doped ZnO nanorod array film via chemical bath deposition method on glass substrates. Microstructural, morphological, and optical properties of Mn doped ZnO nanorods were investigated. X-ray diffraction patterns showed sharp and intense peaks, indicating the highly crystalline nature of the film. Energy dispersive X-ray (EDAX) results confirmed the presence of Mn ions in ZnO nanorods. Scanning electron microscopy (SEM) pictures suggested Mn doped ZnO nanorods were well aligned and distributed throughout the surface. Vibrational analysis has been carried out by Fourier transform infrared and Raman spectroscopy. Room temperature photoluminescence (PL) exhibited the presence of one broad defects related band in the visible region ranging 440–640 nm. Blue shifting in the absorption edge with Mn doping was observed in absorption spectra.

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A new thermoreversible organogel based on diketopyrrolopyrrole dye (DPP-NCO) is reported for the first time and evolved as a new building block for the fabrication of 1D supramolecular assembly. AFM analysis illustrated that its gel state is composed of different sized 1D rods. DPP-NCO gel used as an additive in organic solar cells yields high efficiency of 7.9% owing to better nanophase separation of its active layer.

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