Antimony selenide (Sb₂Se₃) has rapidly emerged in the field of photovoltaics with one-dimensional crystal structure. However, the power conversion efficiency (PCE) of Sb₂Se₃ solar cells is influenced by the orientation of the Sb₂Se₃ photoactive layers. In this study, we investigate the influence of substrate properties on the preferred orientation and microstructure of Sb₂Se₃ films systematically. With the rise of substrate surface temperature and the decline of substrate surface bonding energy, the preferred orientation of the Sb₂Se₃ films altered from (hk0) to (hk1) and finally to (002). After summarizing the performance of different preferentially oriented Sb₂Se₃ solar cells, the results showed that the (hk0)-preferentially oriented devices exhibited a poor performance of less than 1.1 %. As the preferred orientation of Sb₂Se₃ absorbers changed from (hk0) to (hk1), the carrier transport changed from inter-ribbon charge hopping to transportation along the (Sb₄Se₆)_n ribbons. This enhanced the carrier transport efficiency, thereby leading to the enhancement of the PCE to 2–3 %. Furthermore, when the (002) texture coefficient (TC) of the Sb₂Se₃ films was between 1.8 and 3.6, the PCE of the devices was further enhanced to above 3.5 %. A maximum PCE of 4.79 % can be obtained when the (002) TC was 3.24. This study reveals the relationship between the Sb₂Se₃ film preferred orientation and device performance, and demonstrates an effective way to precisely control the Sb₂Se₃ film microstructure to obtain a high PCE.

硒化锑（Sb ₂ Se ₃）以一维晶体结构迅速出现在光伏领域。然而，Sb ₂ Se _{3太阳能电池的功率转换效率（PCE）受Sb 2} Se ₃光活性层的取向影响。在本研究中，我们系统地研究了衬底特性对 Sb ₂ Se ₃薄膜择优取向和微观结构的影响。随着衬底表面温度的升高和衬底表面键合能的下降，Sb ₂ Se _{3的择优取向}电影从 (hk0) 更改为 (hk1)，最后更改为 (002)。在总结不同优先取向的Sb ₂ Se ₃太阳能电池的性能后，结果表明(hk0)-优先取向的器件表现出小于1.1%的较差性能。随着Sb ₂ Se ₃吸收体的择优取向从(hk0)变为(hk1)，载流子传输从带间电荷跳跃变为沿(Sb ₄ Se ₆ ) _n带传输。这提高了载流子传输效率，从而导致 PCE 提高到 2-3%。此外，当 Sb ₂ Se _{3的 (002) 纹理系数 (TC)}薄膜在1.8和3.6之间，器件的PCE进一步提高到3.5%以上。当 (002) TC 为 3.24 时，可以获得 4.79% 的最大 PCE。这项研究揭示了 Sb ₂ Se ₃薄膜的择优取向与器件性能之间的关系，并展示了一种精确控制 Sb ₂ Se ₃薄膜微观结构以获得高 PCE 的有效方法。