For comparison of the qB estimated from the I-V data of the printed SBDs, the work function of the printed Ag electrodes are estimated from the surface-averaged CPD by referring to the work function of Au (5.10 eV) and listed in Table . The estimated work function of vacuum-deposited Ag electrode is 4.68 eV which is very close to the value of Ag (100) (4.64 eV), indicating that our estimation is reasonable for the printed Ag electrodes. In the sintering time of 5min, the work function is 4.49 eV which is lower than the value of vacuumdeposited Ag electrode (4.68 eV), indicating the residual of organics from ligand molecule capping on AgNPs and/or the resin as an additive in AgInk. In further sintering, the work functions of the printed Ag electrodes increased and they all were high compared with that of vacuum-deposited Ag electrode (4.68 eV).