Electrodeposition of Semiconductors in Ionic Liquids

Borisenko, Natalia; Abedin, Sherif Zein El; Endres, Frank

doi:10.1002/9783527622917.ch6

Cited by 9 publications

(8 citation statements)

References 49 publications

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“…Besides, the RE metals are highly corrosive in aqueous medium as they react with water to give hydrogen and metal hydroxides or oxides. 16 Hence, the electrodeposition of Si and RE metals requires the use of a nonaqueous electrolytic medium such as RTILs, [17][18][19] organic solvents [20][21][22] or molten salts. [23][24][25] Among these solvents, the RTILs offer a number of advantages such as wide electrochemical window, high ionic conductivity, superior thermal stability and negligible vapour pressure.…”

Section: Introductionmentioning

confidence: 99%

Single step electrodeposition process using ionic liquid to grow highly luminescent silicon/rare earth (Er, Tb) thin films with tunable composition

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Single step electrodeposition process using ionic liquid to grow highly luminescent silicon/rare earth (Er, Tb) thin films with tunable composition

et al. 2018

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“…[2][3][4][5] The next steps towards a wide applicability of ionic liquids were the development of water-and air-stable ionic liquids with, for example, BF 4 À and PF 6 À counterions and task-specific ionic liquids (TSILs), which were developed individually with specific problems in mind, for example, in organic synthesis. [6][7][8] Right now, there are many special applications that demand new tunable ionic liquids, like the electrodeposition of semiconducting materials and metals, [9][10][11][12][13] catalytic and stoichiometric reactions, [14][15][16][17][18][19][20][21] or even wood processing and pharmaceutical applications. [22][23][24][25] Lately, research efforts have concentrated more on the development of new anions and only very few new cations have been published.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, they might allow the study of pÀp and pÀp + interactions as recently discussed for similar systems, [30,31] or function as an anion receptor. [32,33] In our previous work concerning TAAILs, we kept the aryl part constant (2,4,6-trimethylphenyl, mesityl) and studied the influence of different alkyl chains (C 1 -C 8 , C 11…”

Section: Introductionmentioning

confidence: 99%

Electronic Effects of para‐Substitution on the Melting Points of TAAILs

Schulz

Ahrens

Meyer

et al. 2011

Chemistry An Asian Journal

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Owing to numerous new applications, the interest in “task‐specific” ionic liquids increased significantly over the last decade. But, unfortunately, the imidazolium‐based ionic liquids (by far the most frequently used cations) have serious limitations when it comes to modifications of their properties. The new generation of ionic liquids, called tunable aryl–alkyl ionic liquids (TAAILs), replaces one of the two alkyl chains on the imidazolium ring with an aryl ring which allows a large degree of functionalization. Inductive, mesomeric, and steric effects as well as potentially also ππ and ππ+ interactions provide a wide range of possibilities to tune this new class of ILs. We investigated the influence of electron‐withdrawing and ‐donating substituents at the para‐position of the aryl ring (NO2, Cl, Br, EtO(CO), H, Me, OEt, OMe) by studying the changes in the melting points of the corresponding bromide and bis(trifluoromethanesulfonyl)imide, (N(Tf)2−), salts. In addition, we calculated (B3LYP/6‐311++G(d,p)) the different charge distributions of substituted 1‐aryl‐3‐propyl‐imidazolium cations to understand the experimentally observed effects. The results indicated that the presence of electron‐donating and ‐withdrawing groups leads to strong polarization effects in the cations.

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“…Heat treating the electrodeposited samples yields semiconductors with useful bandgaps. 36,37 The applied system chosen was that of the separation of gallium and arsenic from GaAs wafers, a very common semiconductor material. Gallium is a strategic metal with no primary ore sources, and arsenic is highly toxic and ideally should be recovered rather than released into the ecosystem via landfill.…”

Section: Gaas Leaching and Recoverymentioning

confidence: 99%

Electrocatalytic recovery of elements from complex mixtures using deep eutectic solvents

et al. 2015

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The dissolution and subsequent selective recovery of elements from complex mixtures naturally necessitates redox chemistry. The majority of processes involve hydrometallurgical dissolution followed by selective chemical precipitation or electrochemical winning. The atom and energy efficiencies of these processes are poor, leading to a large volume of aqueous waste which needs to be treated before disposal. In this study it is demonstrated that electrocatalysis is an atom effective method of carrying out digestion and subsequently recovering elements from solution. Here deep eutectic solvents are used to simplify the speciation of solutes and to allow redox potentials to be modified compared to standard aqueous values. The redox catalyst used is iodine, as it demonstrates high solubility, fast electron transfer and the ability to oxidise most elements, including precious metals such as gold. The efficacy of this electrocatalyic method is demonstrated using three samples; Cu/Zn, Ga/As and Au/Ag/sulfidic ore.

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Electrodeposition of Semiconductors in Ionic Liquids

Cited by 9 publications

References 49 publications

Single step electrodeposition process using ionic liquid to grow highly luminescent silicon/rare earth (Er, Tb) thin films with tunable composition

Single step electrodeposition process using ionic liquid to grow highly luminescent silicon/rare earth (Er, Tb) thin films with tunable composition

Electronic Effects of para‐Substitution on the Melting Points of TAAILs

Electrocatalytic recovery of elements from complex mixtures using deep eutectic solvents

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