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The Emitter Controls Its Own Crystal Phase

An X-type quasi-2D perovskite reached 21.9 percent external quantum efficiency in a vacuum-deposited LED.

Published Updated Story ID: mp-2026-07-19-026
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Summary

An X-type quasi-2D perovskite reached 21.9 percent external quantum efficiency in a vacuum-deposited LED.

Seoul National University and Cambridge researchers designed spacer molecules and a lithium-fluoride hetero-scaffold that steer perovskite crystallization during vacuum deposition. The resulting films exceeded 85 percent photoluminescence quantum yield, while devices reached 21.9 percent external quantum efficiency with a 16.8-nanometer emission linewidth. The team also fabricated large-area, flexible, and patterned samples. These are laboratory device metrics, not manufacturing yield, lifetime, or a commercial display.

Why it matters

An X-type quasi-2D perovskite reached 21.9 percent external quantum efficiency in a vacuum-deposited LED.

Limits and context

  • These are laboratory device metrics, not manufacturing yield, lifetime, or a commercial display.

Key claims

  1. An X-type quasi-2D perovskite reached 21.9 percent external quantum efficiency in a vacuum-deposited LED.

    Qualification: These are laboratory device metrics, not manufacturing yield, lifetime, or a commercial display.

    Evidence: source-2026-07-19-015

Sources

  1. Seoul National University via EurekAlert: X-type vapor-deposited PeLEDSeoul National University via EurekAlert · official announcement

Corrections

No corrections have been recorded for this story.