fig3
Figure 3. Purification of recycled PV cells with 10 M KOH and an acid mixture of 10 M HNO3-85% H3PO4 at 150 °C for 1 h: (A) XRD patterns of the commercial bulk Si and purified PV Si; (B) Photograph of the purified PV cells; and (C and D) Photographs of purified PV Si powder and commercial Si powder.
