Electrodeposition of CdSe photoabsorber thin films in the presence of selected organic additives

Production and identification of highly photoconductive CdSe-based hybrid organic-inorganic multi-layer materials

“…It is observed that CdSe/oxalate deposits present improved properties, such as short circuit current and photoelectrochemical efficiencies, compared to pure CdSe as well as CdSe electrodeposited using other additives in the bath, as glutamates [5]. These improved properties are attributed to the smaller size of oxalate species, which are capable to create more crystal defects, when incorporated in the CdSe lattice.…”

“…As presented in our previous works [4,5], hybrid semiconducting products may be developed by deposition of an appropriate thin organic film (specifically ferrocene, commercially obtained) placed between two CdSe thin films in a sandwich-like construction presenting remarkably improved photoresponding behavior [4]. On the other hand, CdSe semiconducting thin films electrodeposited in the presence of some selected organic additives, such as glutamates, oxalates, choline, etc., also exhibit remarkable photoconductive character.…”

“…On the other hand, CdSe semiconducting thin films electrodeposited in the presence of some selected organic additives, such as glutamates, oxalates, choline, etc., also exhibit remarkable photoconductive character. This fact may be attributed to the creation of crystal defects on the CdSe deposits by the organic chemical species derived from the additives, impacting positively or negatively the photoconductivity of the final products [5].…”

“…CdSe, constituting the inorganic part of the hybrid system, is a well-known semiconductor, as referred in our previous works [2,[4][5][6][7] with a direct energy gap (1.7 eV). When electrodeposited, CdSe presents a well-developed cubic zinc-blende structure with a strong (111) preferred orientation [6,8], behaving as a metastable kinetically controlled phase, which can easily be transformed to the thermodynamically stable hexagonal one (wurtzite) by annealing [6].…”

Effect of thickness on structural, optical, electrical and morphological properties of nanocrystalline CdSe thin films for optoelectronic applications

“…The CdSe thin films may be deposited employing a number of techniques like thermal evaporation [3,10], chemical bath deposition [14,15], electro-deposition [16][17][18][19], hot wall deposition [20], spray pyrolysis [21], SILAR [22], etc. These techniques have their own merits and demerits.…”