Organic light-emitting display panel and display device with earth metal dopants

An organic light-emitting display panel, comprising:

• an array substrate comprising a plurality of driving elements;
• a plurality of organic light-emitting components corresponding to the plurality of driving elements, wherein each of the plurality of organic light-emitting components comprises an anode, a cathode and an organic functional layer disposed between the anode and the cathode, wherein the organic functional layer comprises an organic light-emitting layer, a first electron transmission layer disposed between the cathode and the organic light-emitting layer, and a hole injection layer disposed between the anode and the organic light-emitting layer,
• wherein the first electron transmission layer comprises an electron transmission matrix and a first dopant, wherein the first dopant comprises an alkaline earth metal element or a rare earth metal element, and the hole injection layer comprises a hole injection matrix and a second dopant;
• a lowest unoccupied molecular orbital of the electron transmission matrix in the first electron transmission layer LUMO1 and a lowest unoccupied molecular orbital of a host material in the organic light-emitting layer LUMO4 satisfy:
• |LUMO1−LUMO4|<1.7 eV,
• a highest occupied molecular orbital of a hole injection matrix in the hole injection layer HOMO5 and a highest occupied molecular orbital of the host material in the organic light-emitting layer HOMO4 satisfy:
• |HOMO5−HOMO4|<1 eV,
• a work function φ1 of the first dopant is smaller than a work function φ4 of the cathode,
• the second dopant is an organic material, and a lowest unoccupied molecular orbital LUMO of the second dopant and the work function φ3 of the anode satisfy |LUMO−φ3|<0.8 eV,
• the organic functional layer further comprises a second electron transmission layer disposed between the first electron transmission layer and the organic light-emitting layer, and the second electron transmission is undoped by the first dopant,
• a highest occupied molecular orbital of an electron transmission matrix in the second electron transmission layer HOMO2 and the highest occupied molecular orbital of the host material in the organic light-emitting layer HOMO4 satisfy:
• |HOMO2−HOMO4|<1 eV,
• the organic functional layer further comprises a third electron transmission layer disposed between the first electron transmission layer and the second electron transmission layer,
• the third electron transmission layer contains the first dopant, and a doping concentration of the first dopant in the third electron transmission layer is smaller than a doping concentration of the first dopant in the first electron transmission layer,
• a material of an electron transmission matrix in the third electron transmission layer is a same material as a material of an electron transmission matrix in the second electron transmission layer;
• wherein the organic functional layer further comprises a first hole transmission layer located between the hole injection layer and the organic light-emitting layer, and
• wherein a highest occupied molecular orbital of a hole transmission matrix in the first hole transmission layer HOMO6 and the highest occupied molecular orbital of the host material in the organic light-emitting layer HOMO4 satisfy:
• |HOMO6−HOMO4|<0.8 eV;
• wherein the first hole transmission layer and the second electron transmission layer are in direct contact with the organic light-emitting layer, and a hole mobility in the first hole transmission layer and an electron mobility in the second electron transmission layer satisfy:
• |log10[Hm(HTL1)]−log10[Em(ETL2)]|<4.