Perovskite Quantum Dots by Unknown

Author:Unknown
Language: eng
Format: epub
ISBN: 9789811566370
Publisher: Springer Singapore

7.3.3 Response Features

7.3.3.1 Response Time Versus Responsivity

The response time (tr and tf) and responsivity/sensitivity (R) are two interrelated properties. For QD photodetectors, a high R suggests that the device wouldn’t has very high speed; While a high speed device may lead to the low R performance. However, since there are many factors that affect the performance, the usage of this seesaw rule is limited to devices of the same materials and structural parameters. In another word, the responsivity and response time can be improved simultaneously by: (i) perovskite design, e.g. the morphology engineering of QDs, nanowires, nanosheets etc. and surface/interface engineering; (ii) device structure optimization, e.g. shortening of the distance between electrodes in lateral structure or adopting vertical structures; (iii) introducing materials with high carrier transfer rate or to facilitate the carrier extraction.

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