Influence of the Au interlayer on the contact resistance and morphology of CdTe films deposited on molybdenum substrate

Hernández, Germán Pérez; Juárez, A. Sánchez; Resendiz, M.C.; Mathew, Xavier

doi:10.1016/j.solmat.2006.03.002

Cited by 4 publications

(4 citation statements)

References 6 publications

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“…Such measures, referred to as back surface field (BSF) increases cell performance by reducing the recombination at the back contact, leading to improved V oc and reduced series resistance [44,46]. Some commonly used metals and semiconductors, either alone or in combination with others (especially Cu), as back contact layers on glass include C : Cu, Cu, Au, Ag, Sb, Ni, Mo, Te, ZnTe, Sb 2 Te 3 , As 2 Te 3 , CuTe, and HgTe, [6,12,24,26,29,32,44,[47][48][49] When some of these were used in flexible cells, improved cell performances were observed.…”

Section: Superstrate and Substrate Structures In Thin Film Solar Cellsmentioning

confidence: 99%

“…Close-Spaced Sublimation (CSS). The CSS method is considered one of the most successful methods in developing CdTe thin films due to its short deposition time, large grain size, high material utilization, and economical experimental facilities [1,24,38]. Moreover the highest efficiency and cheapest solar cells have been fabricated using this method [3,50].…”

Section: Some Commonly Reported Depositionmentioning

confidence: 99%

“…While stress increases with sublimation temperature, preferential orientation and lattice parameter decrease with increasing temperature. By using Au and Pd interlayer between Mo and CdTe, Mathew [6,24,47] reported reduced contact resistance. In addition there were differences in the surface roughness and grain sizes for films deposited on Mo/Au and Mo; films on Mo/Au are larger than those on Mo, as in Figure 2.…”

Section: Some Commonly Reported Depositionmentioning

confidence: 99%

“…In addition, they showed that a higher V oc (824 mV) is achieved if two CdS layers (separated by air annealing) are used instead of a single CdS layer. Even though CSS has many advantages from the point of view of process time and the photovoltaic performance of the devices, it imposes restrictions on the choice and applicability of interlayer because at high temperatures As-deposited and postannealed CdTe films grown on (a) Mo/Au and (b) Mo[24].…”

mentioning

confidence: 99%

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Recent Developments of Flexible CdTe Solar Cells on Metallic Substrates: Issues and Prospects

Aliyu

Islam

Hamzah

et al. 2012

International Journal of Photoenergy

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This study investigates the key issues in the fabrication of CdTe solar cells on metallic substrates, their trends, and characteristics as well as effects on solar cell performance. Previous research works are reviewed while the successes, potentials, and problems of such technology are highlighted. Flexible solar cells offer several advantages in terms of production, cost, and application over glass-based types. Of all the metals studied as substrates for CdTe solar cells, molybdenum appears the most favorable candidate, while close spaced sublimation (CSS), electrodeposition (ED), magnetic sputtering (MS), and high vacuum thermal evaporation (HVE) have been found to be most common deposition technologies used for CdTe on metal foils. The advantages of these techniques include large grain size (CSS), ease of constituent control (ED), high material incorporation (MS), and low temperature process (MS, HVE, ED). These invert-structured thin film CdTe solar cells, like their superstrate counterparts, suffer from problems of poor ohmic contact at the back electrode. Thus similar strategies are applied to minimize this problem. Despite the challenges faced by flexible structures, efficiencies of up to 13.8% and 7.8% have been achieved in superstrate and substrate cell, respectively. Based on these analyses, new strategies have been proposed for obtaining cheaper, more efficient, and viable flexible CdTe solar cells of the future.

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