Perovskite/Silicon tandem solar cell simulation
Compute the optical short-circuit current (Jsc), EQE, current matching and detailed-balance efficiency limit of perovskite-on-silicon tandem solar cells — layer by layer, under the AM1.5g spectrum.
Why optics decides tandem performance
A perovskite/silicon tandem stacks a wide-bandgap perovskite top cell on a silicon bottom cell to break past the single-junction Shockley–Queisser limit. Its current is set optically: how much sunlight each sub-cell absorbs, where parasitic layers waste photons, and how well the two sub-cells are current-matched. Getting that optical design right — before fabrication — is exactly what Phazic does.
What Phazic computes
- Optical Jsc under ASTM G-173 AM1.5g / 1.5d / AM0, per sub-cell.
- Layer-by-layer absorption A(λ) — active vs parasitic, so you see which layer wastes photons.
- EQE = IQE × A with custom IQE curves.
- Current matching for 2-terminal (2T MIN) and 4-terminal (4T SUM) tandems.
- Depth-resolved absorption A(z) and carrier generation G(z, λ) inside the absorber.
- Lambertian 4n² light-trapping for NIR enhancement.
- Multi-junction Shockley–Queisser detailed-balance η, Voc and FF reference limits.
All on a numerically stable Redheffer S-matrix engine that stays accurate across thick, absorbing and many-layer stacks.
Try it
Phazic runs on Windows, macOS, Linux, iOS, Android and the Web. Define your tandem stack once and read Jsc, EQE and the SQ limit in a single click.