自律型ラボがクラス最高の量子ドットを数時間で発見。(Autonomous Lab Discovers Best-in-Class Quantum Dot in Hours; It Would Have Taken Humans Years)

2023-11-14

2023-11-13 ノースカロライナ州立大学(NCState)

◆研究者は、電子およびフォトニックデバイス向けの最高品質の材料合成にかかる時間を数時間または数日で短縮できる自律システム「SmartDope」を開発しました。
◆このシステムは、ドープされた量子ドットと呼ばれる半導体ナノクリスタルの性質を向上させる方法を特定する課題に焦点を当て、機械学習を駆使して自動的に最適な量子ドットを合成します。従来の手法では数年かかる課題をSmartDopeはわずか1日で達成し、材料科学における流体反応器と機械学習の組み合わせの威力を示しました。

＜関連情報＞

スマート・ドープドープされたペロブスカイト量子ドットの開発を加速する自動運転流体ラボ Smart Dope: A Self-Driving Fluidic Lab for Accelerated Development of Doped Perovskite Quantum Dots

Fazel Bateni, Sina Sadeghi, Negin Orouji, Jeffrey A. Bennett, Venkat S. Punati, Christine Stark, Junyu Wang, Michael C. Rosko, Ou Chen, Felix N. Castellano, Kristofer G. Reyes, Milad Abolhasani
Advanced Energy Materials Published: 12 November 2023
DOI:https://doi.org/10.1002/aenm.202302303

Abstract

Metal cation-doped lead halide perovskite (LHP) quantum dots (QDs) with photoluminescence quantum yields (PLQYs) higher than unity, due to quantum cutting phenomena, are an important building block of the next-generation renewable energy technologies. However, synthetic route exploration and development of the highest-performing QDs for device applications remain challenging. In this work, Smart Dope is presented, which is a self-driving fluidic lab (SDFL), for the accelerated synthesis space exploration and autonomous optimization of LHP QDs. Specifically, the multi-cation doping of CsPbCl₃ QDs using a one-pot high-temperature synthesis chemistry is reported. Smart Dope continuously synthesizes multi-cation-doped CsPbCl₃ QDs using a high-pressure gas-liquid segmented flow format to enable continuous experimentation with minimal experimental noise at reaction temperatures up to 255°C. Smart Dope offers multiple functionalities, including accelerated mechanistic studies through digital twin QD synthesis modeling, closed-loop autonomous optimization for accelerated QD synthetic route discovery, and on-demand continuous manufacturing of high-performing QDs. Through these developments, Smart Dope autonomously identifies the optimal synthetic route of Mn-Yb co-doped CsPbCl₃ QDs with a PLQY of 158%, which is the highest reported value for this class of QDs to date. Smart Dope illustrates the power of SDFLs in accelerating the discovery and development of emerging advanced energy materials.