鈣鈦礦量子點由於其特殊的光電特性而受到了基礎研究和商業應用的極大關注。然而，CsPbI3 鈣鈦礦量子點遭受到從立方至正交的相變，降低在實際應用當中的潛力。而在這項研究當中，我們證明通過熱注入法可用不同的金屬離子（Sb3+，Zn2+和Yb3+）部分取代Pb，以合成高質量且相穩定的CsPbI3鈣鈦礦量子點。在上述金屬離子摻雜中，摻入Sb的CsPbI3 鈣鈦礦量子點表現出最高的光致發光，量子產率超過70％。此外，摻入Sb的CsPbI3也具有優異的穩定性。我們認為這些高效率且穩定的鈣鈦礦將為光伏，發光二極體和顯示器相關應用將為新的選擇。

Perovskite quantum dots (PQDs) have received significant attention for both fundamental research and commercial applications owing to their intriguing optoelectronic properties. However, CsPbI3 PQDs suffer from cubic to orthorhombic phase transformation, which deteriorates their potential for practical applications. In this work, we demonstrate the partial substitution of Pb2+ with different metal ions (Sb3+, Zn2+ and Yb3+) via hot injection for synthesizing high-quality and phase-stable CsPbI3 PQDs. Among the abovementioned metal ion dopant, Sb-doped CsPbI3 PQDs exhibit the highest photoluminescence (PL) with quantum yield (QY) exceeding 70%. Moreover, Sb-doped CsPbI3 possesses excellent stability. This study shows that these highly efficient and stable perovskites can open up new opportunities in photovoltaics, light-emitting diodes, and display-related applications.

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