Correlation between spatially resolved solar cell efficiency and carrier lifetime of multicrystalline silicon

We developed a novel process for synthesizing Si solar cells with improved efficiencies. The process involved the formation of pyramid-like structures on the Si substrate and the deposition and subsequent thermal annealing of an antireflection coating. The process consisted of three main stages. First, pyramid-like structures were textured on the Si substrate by reactive ion etching and subsequently etched using a mixture of HF, HNO3, and deionized water for 300 s. Next, an antireflection coating was deposited on the substrate and was subsequently thermally annealed in a furnace in a N2 atmosphere. After the annealing process, the minority carrier lifetime increased by approximately 40 μs. Further, because of the increase in the minority carrier lifetime and the uniform doping of the substrate, the leakage current decreased. As a result, the efficiency of resulting solar cell increased to 17.24%, in contrast to that of the reference cell, which was only 15.89%. Thus, uniform doping and the thermal annealing of the antireflective coating improved solar cell efficiency.

Download Full-text

Corresponding relation between PL of multicrystalline silicon wafers and solar cell efficiency

Chinese Science Bulletin (Chinese Version) ◽

10.1360/n972018-01135 ◽

2019 ◽

Vol 64 (9) ◽

pp. 923-927

Author(s):

Liang He ◽

Sheng Cao ◽

Hai Liu ◽

Hua Liu ◽

Hongzhi Luo ◽

...

Keyword(s):

Solar Cell ◽

Silicon Wafers ◽

Multicrystalline Silicon ◽

Solar Cell Efficiency ◽

Cell Efficiency

Download Full-text

Experimental and Theoretical Comparable Study of Pure and Zinc Porphyrin Surface Modified ZnO Nanorod Arrays for Hybrid Solar Cell Applications

10.32792/utq/utjsci/vol7/2/26 ◽

2020 ◽

pp. 114-119

Keyword(s):

Solar Cell ◽

Electrochemical Impedance ◽

Hybrid Solar Cell ◽

Cell Performance ◽

Solar Cell Performance ◽

Solar Cell Efficiency ◽

Cell Efficiency ◽

Annealing Effects ◽

Vertically Aligned ◽

Surface Modified

Experimental and theoretical study Porphyrin-grafted ZnO nanowire arrays were investigated for organic/inorganic hybrid solar cell applications. Two types of porphyrin – Tetra (4-carboxyphenyle) TCPP and meso-Tetraphenylporphine (Zinc-TPP)were used to modify the nanowire surfaces. The vertically aligned nanowires with porphyrin modifications were embedded in graphene-enriched poly (3-hexylthiophene) [G-P3HT] for p-n junction nanowire solar cells. Surface grafting of ZnO nanowires was found to improve the solar cell efficiency. There are different effect for the two types of porphyrin as results of Zn existing. Annealing effects on the solar cell performance were investigated by heating the devices up to 225 °C in air. It was found that the cell performance was significantly degraded after annealing. The degradation was attributed to the polymer structural change at high temperature as evidenced by electrochemical impedance spectroscopy measurements.

Download Full-text

Solar cell efficiency tables (Version 58)

Progress in Photovoltaics Research and Applications ◽

10.1002/pip.3444 ◽

2021 ◽

Author(s):

Martin A. Green ◽

Ewan D. Dunlop ◽

Jochen Hohl‐Ebinger ◽

Masahiro Yoshita ◽

Nikos Kopidakis ◽

...

Keyword(s):

Solar Cell ◽

Solar Cell Efficiency ◽

Cell Efficiency

Download Full-text