Extended Data Fig. 10: Back protection using PDMS.
From: Sensitization of silicon by singlet exciton fission in tetracene
During device fabrication, we protect the back contacts using PDMS and an encapsulating piece of silicon to provide a seal during the front-side cleaning step. Here we show that the presence of PDMS on the back side can corrupt the integrity of the front surface. A full RCA clean of the front surface at 80 °C shows no change in photoluminescence under an applied magnetic field. Using a milder version of the clean at 60 °C partly alleviates the issue but the change in photoluminescence from the applied magnetic field is not as large as in the samples processed without PDMS (see Fig. 5).
