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. 2021 Aug 2;33(37):2100677. doi: 10.1002/adma.202100677

Figure 2.

Figure 2

EQEmax as a function of emitter orientation in OLEDs based on purely organic emitters. The figure was made using data from 53 separate reports that include EQEmax and emitter orientation data on 124 materials systems.[ 20 , 22 , 23 , 24 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 ] While there is no correlation between EQEmax and anisotropy across all data, it is clear that the highest efficiency in TADF‐ and non‐TADF‐based systems, respectively, is reached at low anisotropy factors.