A top-emission type organic light emitting diode display substrate having a plurality of subpixel areas in each of which the top-emission type organic light emitting diode display substrate comprises: a base substrate; a thin film transistor on the base substrate and comprising a drain electrode; a planarization layer on a side of the drain electrode distal to the base substrate; an organic light emitting diode on the planarization layer; wherein the drain electrode is a reflective electrode; the organic light emitting diode comprises: a first electrode on the planarization layer; the first electrode is a substantially transparent electrode and electrically connected to the drain electrode; an organic layer on a side of the first electrode distal to the drain electrode, the organic layer comprises an organic light emitting layer; and a second electrode on a side of the organic layer distal to the first electrode, the second electrode is a substantially transparent electrode; the drain electrode and the second electrode form a microcavity structure; the microcavity structure has an optical distance substantially equal to a sum of optical path lengths of layers between the drain electrode and the second electrode; the optical distance is a non-integer multiple of 2πλ, λ is a wavelength of light emitted from the organic light emitting layer; the planarization layer comprises a plurality of sub-layers; and the refractive indexes of the plurality of sub-layers of the planarization layer decrease in a step-wise fashion along a thickness direction away from the base substrate. a base substrate; a thin film transistor on the base substrate and comprising a drain electrode; a planarization layer on a side of the drain electrode distal to the base substrate; an organic light emitting diode on the planarization layer; wherein the drain electrode is a reflective electrode; the organic light emitting diode comprises: a first electrode on the planarization layer; the first electrode is a substantially transparent electrode and electrically connected to the drain electrode; an organic layer on a side of the first electrode distal to the drain electrode, the organic layer comprises an organic light emitting layer; and a second electrode on a side of the organic layer distal to the first electrode, the second electrode is a substantially transparent electrode; the drain electrode and the second electrode form a microcavity structure; the microcavity structure has an optical distance substantially equal to a sum of optical path lengths of layers between the drain electrode and the second electrode; the optical distance is a non-integer multiple of 2πλ, λ is a wavelength of light emitted from the organic light emitting layer; the planarization layer comprises a plurality of sub-layers; and the refractive indexes of the plurality of sub-layers of the planarization layer decrease in a step-wise fashion along a thickness direction away from the base substrate. a first electrode on the planarization layer; the first electrode is a substantially transparent electrode and electrically connected to the drain electrode; an organic layer on a side of the first electrode distal to the drain electrode, the organic layer comprises an organic light emitting layer; and a second electrode on a side of the organic layer distal to the first electrode, the second electrode is a substantially transparent electrode; the drain electrode and the second electrode form a microcavity structure; the microcavity structure has an optical distance substantially equal to a sum of optical path lengths of layers between the drain electrode and the second electrode; the optical distance is a non-integer multiple of 2πλ, λ is a wavelength of light emitted from the organic light emitting layer; the planarization layer comprises a plurality of sub-layers; and the refractive indexes of the plurality of sub-layers of the planarization layer decrease in a step-wise fashion along a thickness direction away from the base substrate.