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Rehman, Malik Abdul,Akhtar, Imtisal,Choi, Woosuk,Akbar, Kamran,Farooq, Ayesha,Hussain, Sajjad,Shehzad, Muhammad Arslan,Chun, Seung-Hyun,Jung, Jongwan,Seo, Yongho Elsevier 2018 Carbon Vol.132 No.-
<P><B>Abstract</B></P> <P>Graphene/Si Schottky junction solar cells are widely studied in relation to the harvesting of solar energy, but high efficiency is limited due to surface recombination at the interface. Moreover, surface defects, wrinkles, and impurities may arise during the wet transfer process of graphene. We propose an easy approach to fabricate high efficiency solar cells by using directly grown graphene on a textured substrate with a large active area. In our novel technique, we directly grow a few layers of graphene on top of Al<SUB>2</SUB>O<SUB>3</SUB>/Si by using plasma enhanced chemical vapor deposition. The high-k dielectric layer of Al<SUB>2</SUB>O<SUB>3</SUB> acts as an electron blocking layer which minimizes the surface recombination at the interface. Furthermore, the barrier width is optimized by controlling the thickness of the Al<SUB>2</SUB>O<SUB>3</SUB> interlayer to achieve the highest efficiency of 8.4%. The devices were not intentionally doped, and no aging effect was found in 9 months. We believe that our stable solar cell results indicate a new route for the production of metal-insulator-semiconductor Schottky junction solar cells with high efficiency without need of chemical doping of the emitter layer.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Phalaris canariensis L. (Poaceae): A new alien plant record for Kashmir Himalaya, India
Shugufta Rasheed,Anzar Ahmad Khuroo,Maroof Hamid,Aijaz Hassan Ganie,Akhtar Hussain Malik,Ghulam Hassan Dar 국립중앙과학관 2016 Journal of Asia-Pacific Biodiversity Vol.9 No.1
The correct taxonomic identification assumes first and foremost priority in the scientific documentation of biodiversity. The Kashmir Himalaya, located in the north-western side of the Himalayan biodiversity hotspot, is well-known for its diverse flora which merits immediate scientific documentation. In this context, the present study reports Phalaris canariensis L. (Poaceae) as a new alien plant record to the flora of Kashmir Himalaya, India. In this paper, a detailed description, photographs, and comparison of diagnostic characters with allied species are provided to scientifically validate this alien plant record for this Himalayan region.