High‐Efficiency Graphene‐Oxide/Silicon Solar Cells with an Organic‐Passivated Interface

A breakthrough in graphene-oxide/silicon heterojunction solar cells is presented in which edge-oxidized graphene and an in-plane charge transfer dopant (Nafion) are combined to form a high-quality passivating contact scheme. A graphene oxide (GO):Nafion ink is developed and an advanced back-junction GO:Nafion/n-Si solar cell with a high-power conversion efficiency (18.8%) and large area (5.5 cm2) is reported. This scalable solution-based processing technique has the potential to enable low-cost carbon/silicon heterojunction photovoltaic devices

Transferring Desirable Genes from Agropyron cristatum 7P Chromosome into Common Wheat.

Wheat-Agropyron cristatum 7P disomic addition line Ⅱ-5-1, derived from the distant hybridization between A. cristatum (2n = 4x = 28, PPPP) and the common wheat cv. Fukuhokomugi (Fukuho), displays numerous desirable agronomic traits, including enhanced thousand-grain weight, smaller flag leaf, and enhanced tolerance to drought. In order to transfer these traits into common wheat, Ⅱ-5-1 was induced by 60Co-γ ray, leading to the creation of 18 translocation lines and three deletion lines. Genomic in situ hybridization (GISH) and fluorescence in situ hybridization (FISH) indicated that multiple wheat chromosomes were involved in the translocation events, including chromosome 2A, 3A, 5A, 7A, 3B, 5B, 7B, 3D and 7D. A. cristatum 7P chromosome was divided into 15 chromosomal bins with fifty-five sequence-tagged site (STS) markers specific to A. cristatum 7P chromosome. Seven and eight chromosomal bins were located on 7PS and 7PL, respectively. The above-mentioned translocation and deletion lines each contained different, yet overlapping 7P chromosomal fragments, covering the entire A. cristatum 7P chromosome. Three translocation lines (7PT-13, 7PT-14 and 7PT-17) and three deletion lines (del-1, del-2 and del-3), which contained the common chromosomal bins 7PS1-3, displayed higher thousand-grain weigh than Fukuho, suggesting that potential genes conferring high thousand-grain weigh might be located on these chromosomal bins. Therefore, wheat-A. cristatum 7P translocation lines with elite traits will be useful as novel germplasms for wheat genetic improvement

Stable Organic Passivated Carbon Nanotube–Silicon Solar Cells with an Efficiency of 22%

The organic passivated carbon nanotube (CNT)/silicon (Si) solar cell is a new type of low-cost, high-efficiency solar cell, with challenges concerning the stability of the organic layer used for passivation. In this work, the stability of the organic layer is studied with respect to the internal and external (humidity) water content and additionally long-term stability for low moisture environments. It is found that the organic passivated CNT/Si complex interface is not stable, despite both the organic passivation layer and CNTs being stable on their own and is due to the CNTs providing an additional path for water molecules to the interface. With the use of a simple encapsulation, a record power conversion efficiency of 22% is achieved and a stable photovoltaic performance is demonstrated. This work provides a new direction for the development of high-performance/low-cost photovoltaics in the future and will stimulate the use of nanotubes materials for solar cells applications

Six lines sharing one common chromosomal bins 7PS1-3 displayed high thousand-grain weight.

<p>Six lines sharing one common chromosomal bins 7PS1-3 displayed high thousand-grain weight.</p

PCR amplification patterns of five STS markers.

<p>a, <i>Agc23527</i>; b, <i>Agc389</i>; c, <i>Agc52001</i>; d, <i>Agc27894</i>; e, <i>Agc51785</i>. 1, Marker; 2, Z559; 3, Ⅱ-5-1; 4, Fukuho; 5, 7PT-3; 6, 7PT-2; 7, 7PT-1; 8, del-3; 9, 7PT-15; 10, del-2; 11, 7PT-14; 12, 7PT-13; 13, 7PT-12; 14, 7PT-16; 15, del-1; 16, 7PT-17; 17, 7PT-18; 18, 7PT-4; 19, 7PT-5; 20, 7PT-6; 21, 7PT-7; 22, 7PT-8; 23, 7PT-9; 24, 7PT-10; 25, 7PT-11.</p