All-inorganic perovskites, adopting cesium (Cs⁺) cation to completely replace the organic component of A-sites of hybrid organic–inorganic halide perovskites, have attracted much attention owing to the excellent thermal stability. However, all-inorganic iodine-based perovskites generally exhibit poor phase stability in ambient conditions. Herein, we propose an efficient strategy to introduce antimony (Sb³⁺) into the crystalline lattices of CsPbI₂Br perovskite, which can effectively regulate the growth of perovskite crystals to obtain a more stable perovskite phase. Due to the much smaller ionic radius and lower electronegativity of trivalent Sb³⁺ than those of Pb²⁺, the Sb³⁺ doping can decrease surface defects and suppress charge recombination, resulting in longer carrier lifetime and negligible hysteresis. As a result, the all-inorganic perovskite solar cells (PSCs) based on 0.25% Sb³⁺ doped CsPbI₂Br light absorber and screen-printable nanocarbon counter electrode achieved a power conversion efficiency of 11.06%, which is 16% higher than that of the control devices without Sb³⁺ doping. Moreover, the Sb³⁺ doped all-inorganic PSCs also exhibited greatly improved endurance against heat and moisture. Due to the use of low-cost and easy-to-process nanocarbon counter electrodes, the manufacturing process of the all-inorganic PSCs is very convenient and highly repeatable, and the manufacturing cost can be greatly reduced. This work offers a promising approach to constructing high-stability all-inorganic PSCs by introducing appropriate lattice doping.

全无机钙钛矿采用铯（Cs ⁺）阳离子完全取代有机-无机杂化卤化物钙钛矿A位的有机成分，因其优异的热稳定性而备受关注。然而，全无机碘基钙钛矿在环境条件下通常表现出较差的相稳定性。在此，我们提出了一种有效的策略，将锑（Sb ^{3+ ）引入CsPbI} ₂ Br钙钛矿的晶格中，可以有效调节钙钛矿晶体的生长，以获得更稳定的钙钛矿相。^{由于三价Sb 3+}比Pb ²⁺的离子半径小得多，电负性也低，因此Sb ³⁺掺杂可以减少表面缺陷并抑制电荷复合，从而延长载流子寿命和可忽略不计的滞后。^{结果，基于0.25% Sb 3+}掺杂CsPbI ₂ Br光吸收剂和可丝网印刷纳米碳对电极的全无机钙钛矿太阳能电池（PSC）实现了11.06%的功率转换效率，比传统钙钛矿太阳能电池提高了16%。没有Sb ³⁺掺杂的控制器件。此外，Sb ³⁺掺杂的全无机 PSC 还表现出大大提高的耐热性和耐湿性。由于使用低成本且易于加工的纳米碳对电极，全无机PSC的制造过程非常方便且可重复性高，并且可以大大降低制造成本。这项工作为通过引入适当的晶格掺杂来构建高稳定性全无机 PSC 提供了一种有前景的方法。