How to debond photovoltaic panels

How to recycle back Eva layer on solar cells in c-Si PV module?

By utilizing a 1064 nm near-infrared optical-fiber pulsed laser, a laser irradiation followed by mechanical peeling method was demonstrated to recycle the back EVA layer on the solar cells in c-Si PV module.

How crystalline silicon (c-Si) photovoltaic (PV) module assemble?

Typical assembling structure of the crystalline silicon (c-Si) photovoltaic (PV) module. Generally, the mechanical crushing treatment is simple to operate and has relatively low cost, but the recycled components are broken and various materials are mixed together with low purity.

How did Bruton & song disassemble a solar PV module?

Song et al. utilized a high voltage fragmentation technology to break the module and separate the resultant glass particles (Song et al., 2020). Bruton et al. disassembled the PV module by soaking it in nitric acid for 24 h at a specific temperature (Bruton et al., 1994).

Does laser debonding affect a solar cell's adhesive strength?

The rear Al and silver (Ag) electrodes of the solar cell would absorb the laser pulse energy to induce a temperature rise across the cell/EVA interface, which could weaken the adhesive strength of the back EVA. The dependence of the debonding effect on the power density (P) and pulse repetition rate (PRR) of the laser was investigated carefully.

How do you disassemble a PV module?

Bruton et al. disassembled the PV module by soaking it in nitric acid for 24 h at a specific temperature (Bruton et al., 1994). Doi et al. did similar work by using trichloroethylene to dissolve EVA at 80 °C for 10 days (Doi et al., 2001).

How does a solar cell/Eva interface work?

The laser energy will be absorbed by the back metal (Al and Ag) electrode, leading to a temperature rise across the solar cell/EVA interface. The temperature rise can weaken the adhesive strength between the solar cell and EVA, which will make it easy to peel the EVA layer off from the solar cell.