In its August 6 issue (online), Advanced Materials published a paper by professor Liu’s group (DNL1606 and Shaanxi Normal University) entitled “Two-inch-sized Perovskite CH3NH3PbX3 (X=Cl, Br, I) Crystals: Growth and Characterization” (Adv. Mater. 2015, 27 (35), 5176-5183. doi:10.1002/adma.201502597). At the meantime, one of the editors at Advanced Materials published his review on MaterialsViews on this work (http://www.materialsviews.com/supersize-single-crystalline-perovskite-crystals-adma-201502597/). He comments: “As the first time that ever perovskite crystals of this type are grown into dimensions exceeding half an inch, it enables direct comparison with their microcrystalline counterparts. It turns out that these jumbo crystals show better thermostability and optical absorption, lower trap density, lower hole concentration, as well as higher carrier mobility, most likely as a result of reducing grains, boundaries, voids, and surface defects.” He further pointed out: “Therefore, solar cells made of single crystalline perovskites are expected to yield significantly higher power conversion efficiency as they feature not only better carrier generation and transport efficiencies, but also broader light absorption spectra. Besides, the stability of single crystalline perovskites should be much better than the microcrystalline ones.” At the end, he concluded: “As large single crystalline materials form the basis for semiconductor, electronics and optoelectronic industries, this technique will bring high quality perovskite crystals into market at lower costs. While such materials can certainly improve the performance of current products, they will allow exploration and development that are previous hampered by small microcrystalline materials.”
(Text /Photo Doudou Zhang)
MaterialsViews Commends Highly on DNL1606’s Research on Single-Crystalline Perovskite(By Doudou Zhang)