Recent advancements in poly-Si/SiO_xpassivating contacts for high-efficiency silicon solar cells: technology review and perspectives

Abstract

Even as photovoltaics (PV) made out of crystalline silicon (c-Si) become more commonplace, the past decade has witnessed leaps and bounds in performance advances, the majority of which have been...

Passivating Contacts for Crystalline Silicon Solar Cells: An Overview of the Current Advances and Future Perspectives

“…[58][59][60] Subsequent innovations include the RERPoly concept by ECN in 2016, aimed at optimizing rear surface passivation, anti-reflection coatings, and grid electrodes, [61] and the monoPoly structure by SERIS in 2017, which improved the front surface AlO x /SiN y bilayer design. [62] TOPCon solar cells, featuring a hybrid architecture on an ntype wafer, incorporate a p + emitter and an AlO x /SiN y bilayer on the front surface, while a ≈1-3 nm thin interfacial SiO x layer and a n + poly-Si layer are stacked on the rear surface (Figure 5a). This design is compatible with the fabrication processes of mature PERC solar cells, requiring only additional steps for forming the interfacial SiO x layer, deposition of poly-Si, high-temperature annealing, and hydrogenation (Figure 5b).…”

“…[ 58–60 ] Subsequent innovations include the RERPoly concept by ECN in 2016, aimed at optimizing rear surface passivation, anti‐reflection coatings, and grid electrodes, [ 61 ] and the monoPoly structure by SERIS in 2017, which improved the front surface AlO x /SiN y bilayer design. [ 62 ]…”

Large-area MoO x /c-Si heterojunction solar cells with a ICO/Ag back reflector

“…where R T is the total series resistance,R s the extended resistance,R c the contact resistance, andR 0 the residual resistance.R T can be obtained by fitting the experimentalI -V curve according to equation (2), where V is the applied voltage, I the current, n the ideal factor,q the electron charge, k the Boltzmann constant, andT the absolute temperature. R s can be calculated from equation (3), where ρ and t are the resistivity and thickness of the Si substrate, respectively, d is the diameter of the circular electrode.…”

“…Silicon solar cells with passivation contact structures utilize hydrogenated amorphous silicon (a-Si:H) or silicon oxide (SiO x ) as a highly effective passivation layer [1,2] . This layer is inserted between the crystalline silicon (c-Si) wafer and the carrier transport layer, resulting in drastically reduced interface recombination losses and higher efficiency when compared to PERC (Passivated Emitter and Rear Cell) solar cell.…”

Energy harvesting technology based on moisture-responsive actuators

“…Compared with widely used onetime or intermittent small energy supply equipment such as batteries and capacitors, directly harvesting low-grade energy from the environment is undoubtedly a better way to achieve the goal, because abundant low-grade energy in the environment can be directly used or converted into electric energy. [21][22][23][24][25][26] The intense desire to exploit these sources of energy has spawned a wide variety of energy conversion machines, such as solar cells, 27,28 thermoelectric generators, 29,30 piezoelectric nanogenerators, 31,32 triboelectric nanogenerators, 33,34 osmotic generators, 35,36 and hydrovoltaic generators, [37][38][39][40][41][42][43][44][45][46][47] which can harvest energy from light, heat, mechanical motion, osmotic pressure and water, and convert it into electricity. These energy-Luyu Yang received his doctor's degree from the School of Chemistry and Chemical Engineering of Nanjing University of Science and Technology.…”