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Detection of ZnS phases in CZTS thin-films by EXAFS
Hartman, Katy; Newman, Bonna K.; Johnson, J. L.; Du, Hui; Fernandes, P. A.; Chawla, Vardaan; Bolin, Trudy; Clemens, Bruce M.; Cunha, A. F. daCopper zinc tin sulfide (CZTS) is a promising Earthabundant thin-film solar cell material; it has an appropriate band gap of ~1.45 eV and a high absorption coefficient. The most efficient CZTS cells tend to be slightly Zn-rich and Cu-poor. However, growing Zn-rich CZTS films can sometimes result in phase decomposition of CZTS into ZnS and Cu2SnS3, which is generally deleterious to solar cell performance. Cubic ...
CD-MEKC method to analyze triterpene acids in traditional chinese medicines
Du,Hui; Chen,XiaoqingA cyclodextrin-modified micellar electrokinetic chromatographic (CD-MEKC) method was developed to separate and determine betulinic acid (BA), oleanolic acid (OA) and ursolic acid (UA) in traditional Chinese medicines (TCMs). Three pentacyclic triterpene acids were baseline seperated in the buffer (pH 9.0) of 6% (v/v) methanol containing 10 mmol L-1 disodium tetraborate, 10 mmol L-1 sodium dihydrogen phosphate, ...
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