Organic light emitting devices having hole blocking layer utilizing multiple hetero-structure and preparation method thereof

摘要

the efficiency of light emission and an organic light emitting device that can increase the color stability and its manufacturing method is presented . According to one aspect of the present invention , the hole transport layer and the organic light-emitting device by varying the doping concentration adopted a hole pinning layer having a multi- layered configuration that repeats two kinds of hetero- structure material between the electron transporting layer are proposed . ; The organic light emitting device , the hole pinning layer , multi two kinds of hetero