Display substrate and display device

A display substrate, comprising a plurality of pixel units and a protection layer covering the plurality of pixel units, wherein each pixel unit comprises:

• a blue subpixel;
• a transparent color filter layer being arranged in the blue subpixel and configured to allow a blue light beam to be transmitted therethrough toward the display substrate;
• a red subpixel;
• a red fluorescent powder layer being arranged in the red subpixel and configured to emit a red light beam under the excitation of the blue light beam;
• a green subpixel;
• a green fluorescent powder layer being arranged in the green subpixel and configured to emit a green light beam under the excitation of the blue light beam;
• and
• a yellow subpixel;
• a yellow fluorescent powder layer being arranged in the yellow subpixel and configured to emit a yellow light beam under the excitation of the blue light beam;
• wherein the transparent color filter layer arranged in the blue subpixel is formed integrally with the protection layer.