Role of buffer layer on the performances of amorphous silicon solar cells with incorporated nanoparticles produced by plasma enhanced chemical vapor deposition at 27.12 MHz

Raniero, Leandro; Zhang, Shibin; Águas, Hugo; Ferreira, I.; Igreja, Rui; Fortunato, Elvira; Martins, Rodrigo

doi:10.1016/j.tsf.2005.01.059

Cited by 21 publications

(13 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among the devices based on a-Si:H technology, the solar cell was one of the first thought applications, since Spear and LeComber [1] discovered the electronic doping effect. Since then the main research work has been centered in determining ways to raise the conversion efficiency and devices' stability [2]. Therefore, several approaches have been suggested, going from the use of the so-called protocrystalline to polymorphous silicon [3] films, where the main emphasis is to try to improve the short to medium range order of the aforementioned films.…”

Section: Introductionmentioning

confidence: 99%

Study of nanostructured silicon by hydrogen evolution and its application in p–i–n solar cells

Raniero¹,

Ferreira²,

Pereira³

et al. 2006

Journal of Non-Crystalline Solids

Self Cite

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Study of nanostructured silicon by hydrogen evolution and its application in p–i–n solar cells

Raniero¹,

Ferreira²,

Pereira³

et al. 2006

Journal of Non-Crystalline Solids

Self Cite

View full text Add to dashboard Cite

“…Recently, there has been great interest in nanocrystalline phases of silicon due to their size dependent electronic and optical properties.[1] Nanoparticles with physical dimensions less than the bulk Bohr exciton radius of silicon (4 nm) typically display intense photoluminescence due to quantum size effects and have potential use both in optoelectronic devices [2][3][4] and as fluorescent biomarkers. [5,6] In the case of crystalline silicon nanoparticles, the photoluminescence (PL) will shift to higher energies as the average size of the nanoparticles is reduced.…”

mentioning

confidence: 99%

Mechanochemical Synthesis of Blue Luminescent Alkyl/Alkenyl‐Passivated Silicon Nanoparticles

Heintz¹,

Fink²,

Mitchell³

2007

Advanced Materials

143

118

View full text Add to dashboard Cite

Silicon is a key material in the microelectronics industry. Recently, there has been great interest in nanocrystalline phases of silicon due to their size dependent electronic and optical properties.[1] Nanoparticles with physical dimensions less than the bulk Bohr exciton radius of silicon (4 nm) typically display intense photoluminescence due to quantum size effects and have potential use both in optoelectronic devices [2][3][4] and as fluorescent biomarkers. [5,6] In the case of crystalline silicon nanoparticles, the photoluminescence (PL) will shift to higher energies as the average size of the nanoparticles is reduced. [7,8] Particle sizes of the order of ∼ 1 nm have been termed "ultrabright" and show an intense emission in the blue region of the visible spectrum. [9][10][11] In addition to a dependence on the particle size, the photoluminesence of silicon nanoparticles is also influenced by the nature of the passivating layer on the particle surface. [12][13][14][15] Passivation of the surface provides chemical stability to air-oxidation and Ostwald ripening and also ties down defect states at the surface caused by dangling bonds. Successful passiviation of the silicon surface has been recently achieved by chemically inert alkyl groups. A surface passivated with strong Si-C bonds is chemically stable and the effective band gap of the silicon nanoparticle is relatively unperturbed by the alkyl passivation.[16] Alkyl passivated nanoparticles have been previously produced by chemical and electrochemical etching of bulk silicon, [17][18][19][20] the reduction of halosilanes, [21,22] the oxidation of metal silicides, [23,24] and the thermal decomposition of silanes in the gas phase [25][26][27] and supercritical fluids.[28] Each of these approaches requires the use of highly reactive or corrosive chemicals and often requires the modification of unstable hydrogen or halogen terminated surfaces. [29,30] Direct approaches, commonly involving the mechanical scribing of silicon in the presence of reactive organic reagents, have found success in the patterning of silicon surfaces though reaction of a freshly exposed surface with the organic reagent. [31][32][33][34] However, these techniques are limited to large and regular surfaces, and are not practical for use with nanoparticles. Here we describe a novel top-down procedure for the synthesis of stable alkyl/alkenyl passivated silicon nanoparticles using high energy ball milling (HEBM). [35] The main advantage of this mechanochemical approach is the simultaneous production of silicon nanoparticles and the chemical passivation of the particle surface by alkyl/alkenyl groups covalently linked through strong Si-C bonds. The overall procedure for production of alkyl/alkenyl passivated silicon nanoparticles is illustrated in Figure 1. A milling vial is loaded under inert atmosphere with non-spherical millimeter-sized pieces of semiconductor-grade silicon and either an alkene or alkyne. Stainless steel milling balls are added to the vial, which is then sealed and placed in...

show abstract

“…Additionally, the buffer layers are efficient in controlling the diffusion between the dopants of the p-and i-layers [46][47][48]. The back contact consists of a thin Ag layer (≈30 nm) used to improve the light reflectance, followed by an Al layer (≈170 nm) with an electrode area of 0.07 cm 2 [49].…”

Section: Solar Cells Depositionmentioning

confidence: 99%

Nanostructured silicon and its application to solar cells, position sensors and thin film transistors

Martins

Raniero

Pereira

et al. 2009

Philosophical Magazine

Self Cite

View full text Add to dashboard Cite

Role of buffer layer on the performances of amorphous silicon solar cells with incorporated nanoparticles produced by plasma enhanced chemical vapor deposition at 27.12 MHz

Cited by 21 publications

References 8 publications

Study of nanostructured silicon by hydrogen evolution and its application in p–i–n solar cells

Study of nanostructured silicon by hydrogen evolution and its application in p–i–n solar cells

Mechanochemical Synthesis of Blue Luminescent Alkyl/Alkenyl‐Passivated Silicon Nanoparticles

Nanostructured silicon and its application to solar cells, position sensors and thin film transistors

Contact Info

Product

Resources

About