Silicon heterojunction solar cell with interdigitated back contacts for a photoconversion efficiency over 26%

Laser-Patterning Engineering for Perovskite Solar Modules With 95% Aperture Ratio

“…[8] [1] Moreover, the efficiency of lab-scale PSCs have exceeded the PCE of multicrystalline silicon solar cells (PCE = 21.3%) [1] and is close to even single crystal silicon solar cells (PCE = 26.7%). [2] PSCs consist of an absorber perovskite layer, which resides between a Hole Transporting Material (HTM) and an Electron Transporting Material (ETM) for the selective extraction of photogenerated holes and electrons, respectively. Perovskites A. L. Palma, F. Matteocci, A. Agresti, S. Pescetelli, E. Calabrò, L. Vesce, and A.…”

“…Finally, the gold counterelectrode is deposited on the entire module and the P3 laser step is required to separate adjacent cells. A laser patterning was applied to the first PSM in early 2014 showing a PCE of 5.1% on an AA of 16.8 cm 2 , and an AR of 67%. [21] A Nd:YVO4 raster scanning laser (λ = 1064 nm) was used to pattern the FTO, realizing the P1 patterning step, while a lift-off technique was applied to remove the compact TiO2 (cTiO2) ETM on the interconnection areas.…”

“…In this way, it is possible to selectively remove the perovskite and HTM from the interconnection regions, without damaging the TCO and leaving the latter surface free to receive the evaporated counter-electrode of the next cell (in a series connection), as shown in Fig.1, realizing a low-resistance vertical contact. [29,37,38] Razza et al [24] reported the first PSM to have an AA = 100 cm 2 , that showed a PCE = 4.3% and an AR = 73%, adopting P3HT as HTM. The realization of this large PSM required the adoption of an airflow-assisted blade coating technique to deposit the active layers while the laser patterning was based on the use of a CO2 laser (λ = 10600 nm, Pulse duration: 53.4 µs) for a rapid prototyping.…”

The Photovoltaic Installation Application in the Public Utility Building

“…The efficiency of photovoltaic cells from monocrystalline silicon is currently between 18-26.3% [26][27][28][29][30] and from polycrystalline cells is between 14-21.7% [31,32]. The lowest efficiency is photovoltaic organic cells 8.7-12.1%, called third generation ones [33,34].…”

Applicability of photonic sintering and autoclaving as alternative contact formation methods for silicon solar cells with passivating contacts

“…For silicon heterojunction (SHJ) solar cells, outstanding efficiencies of 26.7% [2,3] using an interdigitated backcontact (IBC) configuration and 25.1% [4] using a both-sides contacted (BSC) configuration are reported. In the BSC cell design, stacks of intrinsic and doped hydrogenated amorphous silicon (a-Si) layers on both sides of textured ntype silicon wafers are used to form carrier-selective heterojunctions that exhibit excellent passivation properties [5,6].…”