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Antimony triselenide (Sb₂Se₃) is an inorganic compound that occurs in nature as the mineral . Its black orthorhombic crystals have a metallic luster. It is primarily found in China, the Czech Republic, and Russia.

French scientist P. Chrétien prepared crude Sb₂Se₃ from the elements in 1906. In 1924, Ludwig Moser and Kasimir Atynski at the Technical University of Vienna by treating an aqueous solution of potassium antimony tartrate with hydrogen selenide gas.

Historically, Sb₂Se₃ has been used in pyrotechnics and flares and as an ingredient in paint pigments, glass, matches, and explosives. Most of these uses have been disontinued because of the dangers associated with the compound (see the hazard information table).

But Sb₂Se₃ is becoming a 21st century player in the field of electronics. As Chuan-Hui Cheng, Weifeng Liu, and colleagues at the Dalian University of Technology, the Chinese Academy of Sciences (Dalian), and Hainan University (all in China) put it, “Antimony selenide (Sb₂Se₃) is an emerging photovoltaic material.â€�

In their work to develop high-performance solar cells, the authors note that Sb₂Se₃ has attractive properties such as “appropriate band gap, high absorption coefficient, single-phase structure at room temperature, inert grain boundaries, earth-abundant constituents, relatively cheap price, and low toxicityâ€�, although that last claim can be called into question.

In any case, the researchers describe their preparation of as a key component of solar cells. They improved the performance of the films by using a highly aromatic small molecule called NPB¹ to induce the crystallization of Sb₂Se₃ during the annealing process. This refinement increased the photogenerated carrier lifetime of the cell and suppressed interface recombination near the anode.

The contains a profuse amount of information on Sb₂Se₃, including a rotatable 3-D image of its crystal structure.

1. NPB is N,Nâ€�-²ú¾±²õ(²Ô²¹±è³ó³Ù³ó²¹±ô±ð²Ô-1-²â±ô)-N,Nâ€�-bis(phenyl)benzidine, CAS Registry no. 123847-85-8.