Oled device and manufacturing method

A display apparatus, comprising an OLED device, wherein the OLED device comprises:

• an anode;
• a hole transport layer on a side of the anode;
• a light-emitting layer on a side of the hole transport layer facing away from the anode;
• an electron transport layer on a side of the light-emitting layer facing away from the hole transport layer;
• wherein the electron transport layer includes:
• a first electron transport body and a second electron transport body, wherein the first electron transport body has a spiro structure, the second electron transport body has a continuous π conjugated system formed by fusing a dioxin structure and a benzoheterocyclic structure, an electron mobility of the first electron transport body is less than an electron mobility of the second electron transport body, the electron mobility of the second electron transport body is 10−5 cm2V−1s−1-10−8 cm2V−1s−1, a triplet-state energy level of the first electron transport body is greater than a triplet-state energy level of the second electron transport body, and the triplet-state energy level of the first electron transport body is greater than 2.4 eV;
• and
• a cathode on a side of the electron transport layer facing away from the light-emitting layer.