Tin and germanium monochalcogenide IV–VI semiconductor nanocrystals for use in solar cells

Antunez, Priscilla D.; Buckley, Jannise J.; Brutchey, Richard L.

doi:10.1039/c1nr10084j

Cited by 272 publications

(230 citation statements)

References 117 publications

Supporting

Mentioning

224

Contrasting

Order By: Relevance

“…Monolayers of layered orthorhombic materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] can become disordered at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Disorder in Black Phosphorus and Monochalcogenide Monolayers

et al. 2016

View full text Add to dashboard Cite

Ridged, orthorhombic two-dimensional atomic crystals with a bulk Pnma structure such as black phosphorus and monochalcogenide monolayers are an exciting and novel material platform for a host of applications. Key to their crystallinity, monolayers of these materials have a four-fold degenerate structural ground state, and a single energy scale E C (representing the * To whom correspondence should be addressed † Department of Physics. elastic energy required to switch the longer lattice vector along the x− or y−direction) determines how disordered these monolayers are at finite temperature. Disorder arises when nearest neighboring atoms become gently reassigned as the system is thermally excited beyond a critical temperature T c that is proportional to E C /k B . E C is tunable by chemical composition and it leads to a classification of these materials into two categories: (i) Those for which E C ≥ k B T m , and (ii) those having k B T m > E C ≥ 0, where T m is a given material's melting temperature. Black phosphorus and SiS monolayers belong to category (i): these materials do not display an intermediate order-disorder transition and melt directly. All other monochalcogenide monolayers with E C > 0 belonging to class (ii) will undergo a two-dimensional transition prior to melting. E C /k B is slightly larger than room temperature for GeS and GeSe, and smaller than 300 K for SnS and SnSe monolayers, so that these materials transition near room temperature. The onset of this generic atomistic phenomena is captured by a planar Potts model up to the orderdisorder transition. The order-disorder phase transition in two dimensions described here is at the origin of the Cmcm phase being discussed within the context of bulk layered SnSe.

show abstract

“…Monolayers of layered orthorhombic materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] can become disordered at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Disorder in Black Phosphorus and Monochalcogenide Monolayers

et al. 2016

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5][6][7] However, in recent times, the focus has shied towards developing Cd and Pb free (due to their highly toxic nature) chalcogenide compounds. 8 The quest for low toxic, costeffective, and efficient photovoltaic materials continues to fuel new research in the eld of semiconductor nanocrystal synthesis.…”

Section: Introductionmentioning

confidence: 99%

Aqueous phase one-pot green synthesis of SnSe nanosheets in a protein matrix: negligible cytotoxicity and room temperature emission in the visible region

2015

View full text Add to dashboard Cite

In recent times, SnSe has attracted considerable attention as an environmentally friendly alternative to cadmium-and lead-based photovoltaic materials. Herein, we report a rapid, facile, reproducible, and purely green method for the synthesis of SnSe nanosheets (NS) in an aqueous solution of bovine serum albumin (BSA). Interestingly, BSA itself acted as a reducing agent, stabilizing agent and shape directing template. Time dependent TEM imaging showed the self-assembly of the nanoparticles (NPs) into single crystalline NS. A probable mechanism has been proposed on the basis of the alteration of the intrinsic a-helix structure of BSA into b-pleated sheets at the pH ($3.0) of the reaction mixture. This directs the self-assembly of small SnSe NPs into the NS like structure. It was further evident that the -NH and the -S-S-linkages in the protein are involved in the functionalization of the NPs. As grown SnSe nanomaterial was found to display room temperature photoluminescence (PL), which has been rarely reported. The PL spectra appeared to be the convolution of two bands at 425 and 470 nm, which were attributed to the band-gap and trap/surface state emission, respectively. Moreover, the reduction potential values obtained from the cyclic voltammetry indicate better thermodynamic feasibility for the reduction of SnSe, while the cytotoxicity studies revealed no toxic effects up to a concentration of 100 mM. This signifies the potential application of these nanomaterials in photovoltaics and biomedical contexts.

show abstract

“…[11][12][13][14] Additionally, the congruent sublimation feature of GeSe makes it ideal for thin film deposition through thermal sublimation, entirely compatible with conventional processing methods for CdTe thin-film solar cells. [15] All the aforementioned features merit its exploration for photovoltaic applications.…”

mentioning

confidence: 99%

Investigation of Physical and Electronic Properties of GeSe for Photovoltaic Applications

Liu

Xue

et al. 2017

Adv Elect Materials

View full text Add to dashboard Cite

GeSe is a promising absorber material for photovoltaic applications due to its attractive material, optical, and electrical properties as well as its low toxicity and earth abundance. The first GeSe‐based solar cell with 1.48% efficiency has been recently reported through self‐regulated rapid thermal sublimation. However, most of the fundamental physical and electronic properties of GeSe such as refractive index, dielectric constant, carrier mobility, lifetime, and diffusion length remain unclear, despite the necessity of this for the design of high‐performance GeSe solar cells. In this work, the above basic properties of GeSe are systematically studied by using spectroscopic ellipsometry, space charge limited current measurements, and transient absorption spectroscopy. These comprehensive results provide a solid foundation for the further development of GeSe solar cells.

show abstract

Tin and germanium monochalcogenide IV–VI semiconductor nanocrystals for use in solar cells

Cited by 272 publications

References 117 publications

Two-Dimensional Disorder in Black Phosphorus and Monochalcogenide Monolayers

Two-Dimensional Disorder in Black Phosphorus and Monochalcogenide Monolayers

Aqueous phase one-pot green synthesis of SnSe nanosheets in a protein matrix: negligible cytotoxicity and room temperature emission in the visible region

Investigation of Physical and Electronic Properties of GeSe for Photovoltaic Applications

Contact Info

Product

Resources

About