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EL QDs Not Near Commercial Performance Levels
Nanosys, has enjoyed great success in supplying red and green QDs for backlights used in LCDs, primarily TVs but now targeted for other applications including monitors, notebooks and automobiles. The company, however, continues to pursue the far off objective of electroluminescent QDs and each years at DisplayWeek shows progress in extending the lifetime of QDs, which is the major constraint in achieving a commercial product. This year they showed 25x Y/Y improvement in red and 30x improvement in green lifetimes as shown below.
Figure 1: EL QD Lifetime Improvement
Nanosys, has enjoyed great success in supplying red and green QDs for backlights used in LCDs, primarily TVs but now targeted for other applications including monitors, notebooks and automobiles. The company, however, continues to pursue the far off objective of electroluminescent QDs and each years at DisplayWeek shows progress in extending the lifetime of QDs, which is the major constraint in achieving a commercial product. This year they showed 25x Y/Y improvement in red and 30x improvement in green lifetimes as shown below.
Figure 1: EL QD Lifetime Improvement
To put this in context however, Nanosys uses lifetime of T50 @ 100 nits. The commercial standard of OLED panel makers, the closet comparable performance, is T97 at 1,000 to 1,200nits. Current OLED emitting material makers do not publish T50 at 100 nits. However, we attempting to convert their existing available performance levels to these much reduced measurements in order to compare the technologies and plotted the results on a standard vertical axis, not the log scale that Nanosys used. The comparison shows that Nanosys despite the 25 to 30 x Y/Y improvements Nanosys has a long way to go before they get into the commercial ballpark.
Figure 2: OLED Emitters vs. EL QD Lifetime
Figure 2: OLED Emitters vs. EL QD Lifetime
