Mask, electrode, preparation method of electrode and light-emitting device

The invention discloses a mask, an electrode, a preparation method of the electrode and a light-emitting device. The mask plate comprises a plate body and a through hole, and the plate body comprises a first surface and a second surface which are oppositely arranged; the through hole is formed in the plate body and penetrates through the first surface and the second surface, the through hole comprises an inner side face, a first opening and a second opening, the first opening and the second opening are oppositely arranged, the first opening is formed in the first surface, and the second opening is formed in the second surface; the projection of the first opening on the second surface is located in the second opening. According to the preparation method of the electrode, the yield of the electrode can be increased, the contact area of the electrode and the substrate can be increased, and the probability of electrode falling is further reduced. 本申请公开了一种掩膜版、电极、电极的制备方法和发光器件。一种掩膜版，包括版体和通孔，版体包括相对设置的第一表面和第二表面；通孔开设于版