Babu Ramavath, Bhandary Subhrajyoti, Chopra Deepak, Singh Surya Prakash
Polymers and Functional Materials Division, CSIR-Indian Institute of Chemical Technology (IICT), Uppal Road, Tarnaka, Hyderabad, 500007, India.
Department of Chemistry, Crystallography and Crystal Chemistry Laboratory, IISER, Bhopal, 462066, India.
Chemistry. 2020 Aug 17;26(46):10519-10527. doi: 10.1002/chem.202000506. Epub 2020 Jul 27.
Despite the great success in the increase in the power conversion efficiency of lead halide perovskite solar cells, the toxicity of lead and the unstable nature of the materials are still major concerns for their wider implementation at the industrial level. Herein, large-size single crystals (SCs) are developed in HI solution by using a temperature lowering method and nanocrystals (NCs) of A Bi I perovskites [where A=CH NH (MA) , Cs , and (Rb Cs ) ] are formed in ethanol (EtOH) and toluene (TOL). The stability of A Bi I perovskite is investigated by immersing the SCs for 24 h and pellets for 12 h in water. Moreover, the A Bi I perovskite NCs displays a promising photoluminescence quantum yield of 17.63 % and a long lifetime of 8.20 ns.
尽管卤化铅钙钛矿太阳能电池在功率转换效率提升方面取得了巨大成功，但铅的毒性以及材料的不稳定性质仍是其在工业层面更广泛应用的主要担忧。在此，通过降温法在氢碘酸溶液中制备了大尺寸单晶，并且在乙醇（EtOH）和甲苯（TOL）中形成了ABiI钙钛矿的纳米晶体（NCs）[其中A = CH₃NH₃⁺（MA⁺）、Cs⁺以及（Rb₀.₅Cs₀.₅）⁺]。通过将单晶浸泡在水中24小时以及将小球浸泡12小时来研究ABiI钙钛矿的稳定性。此外，ABiI钙钛矿纳米晶体展现出17.63%的可观光致发光量子产率以及8.20纳秒的长寿命。
