Good Quality N (a-Si)-P+(Na-Si)-P (μC-Si) Tunnel Junction for Tandem Solar Cells

Lan Li Chen; Ming Ji Shi; Jia Hui Yu

doi:10.4028/www.scientific.net/SSP.181-182.336

Paper Titles

Influence of Morphology of Vacuum-Evaporated Oligothiophene Derivative Films on Oganic Photovoltaic Performance
p.320

Effect of B₂O₃ on Microwave Dielectric Properties of Ca[(Li_1/3Nb_2/3)_0.92Zr_0.08]O_3−δ−0.05TiO₂ Ceramics
p.324

Improvement the Open Circuit Voltage of Amorphous Silicon Solar Cells by Treating the P Layer with Hydrogen Plasma
p.328

Photocatalytic Properties of α-Bi₂O₃ Nanoneedle Array Synthesized by Hydrothermal Method
p.332

Good Quality N (a-Si)-P+(Na-Si)-P (μC-Si) Tunnel Junction for Tandem Solar Cells
p.336

Investigation on High Laser-Induced Damage Threshold of ZrO₂-PVP Thin Films by Hydrothermal Synthesis
p.340

Theory of the Rectifying Performance in Molecular Device: The Role of Anchoring Groups
p.344

Extension of the Optical Absorption of TiO₂ Nanopaticles to Visible Light Region by Doping with Cobalt
p.348

Structure and Magnetic Properties of Co_2.73Fe_0.27O₄ Synthesized by the Heat-Decomposition Method
p.352

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Good Quality N (a-Si)-P+(Na-Si)-P (μC-Si) Tunnel Junction for Tandem Solar Cells

Abstract:

A new tunnel-recombination junction model was proposed to increase the recombination of n/p junctions in tandem solar cells. According to the model, we fabricated a new tunnel junction with a nanostructured amorphous silicon p⁺(na-Si p⁺) layer inserted between the n layer and the p layer. To compare with the conventional method, we fabricated another tunnel junction with an amorphous p⁺(a-Si p⁺) insertion layer. Both devices were characterized by their dark current-voltage behavior (I-V), activation energy (E_a) and quantum efficiency (QE). The result shows that the tunnel junction with a na-Si p⁺ insertion layer has higher recombination rates with higher density of defect states of about 2.7×10¹⁹cm^-3 , lower resistance with activation energy of 22meV. The tunnel junction with a na-Si p⁺ insertion layer could be easily integrated into the tandem solar cell deposition process.