{"title":"cu2 znsns4单晶光致发光光谱的退火行为","authors":"S. Seto, H. Araki","doi":"10.1002/PSSC.201600158","DOIUrl":null,"url":null,"abstract":"We have measured photoluminescence (PL) spectra at 10 K for Cu2ZnSnS4 (CZTS) single crystals grown by the iodine transport method and explored the anneal changes of PL spectra under a Zn and S-saturation. All the crystals showed S- and Zn-poor composition, and nearly stoichiometric composition of Cu/(Zn + Sn). The observed PL spectra are divided into two groups; one is PL band with a peak at ∼1.3 eV (1.3-eV band), and another is PL band with a peak at ∼1.35 eV (1.35-eV band). It was found from SEM observations that the 1.35-eV band was observed in crystals with a mirror-like facet and, on the other hand, the 1.3-eV band was seen in the crystals with some small dark areas where the composition is Cu-poor. The Zn-saturated annealing at 600 °C caused the PL peak shift of ∼0.1 eV, from 1.295 to 1.185 eV. The S-saturated annealing at 550 °C caused a disappearance of PL emission. The implications of these annealing behaviour are discussed.","PeriodicalId":20065,"journal":{"name":"Physica Status Solidi (c)","volume":"140 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":"{\"title\":\"Annealing behaviour of photoluminescence spectra on Cu\\n 2\\n ZnSnS\\n 4\\n single crystals\",\"authors\":\"S. Seto, H. Araki\",\"doi\":\"10.1002/PSSC.201600158\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We have measured photoluminescence (PL) spectra at 10 K for Cu2ZnSnS4 (CZTS) single crystals grown by the iodine transport method and explored the anneal changes of PL spectra under a Zn and S-saturation. All the crystals showed S- and Zn-poor composition, and nearly stoichiometric composition of Cu/(Zn + Sn). The observed PL spectra are divided into two groups; one is PL band with a peak at ∼1.3 eV (1.3-eV band), and another is PL band with a peak at ∼1.35 eV (1.35-eV band). It was found from SEM observations that the 1.35-eV band was observed in crystals with a mirror-like facet and, on the other hand, the 1.3-eV band was seen in the crystals with some small dark areas where the composition is Cu-poor. The Zn-saturated annealing at 600 °C caused the PL peak shift of ∼0.1 eV, from 1.295 to 1.185 eV. The S-saturated annealing at 550 °C caused a disappearance of PL emission. The implications of these annealing behaviour are discussed.\",\"PeriodicalId\":20065,\"journal\":{\"name\":\"Physica Status Solidi (c)\",\"volume\":\"140 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2017-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"5\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Physica Status Solidi (c)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1002/PSSC.201600158\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physica Status Solidi (c)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1002/PSSC.201600158","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5
摘要
本文测量了用碘输运法生长的Cu2ZnSnS4 (CZTS)单晶在10 K时的光致发光(PL)光谱，并探讨了Zn和s饱和下PL光谱的退火变化。所有晶体均表现为贫S和贫Zn成分，且接近于Cu/(Zn + Sn)的化学计量组成。观测到的PL光谱分为两组;一个是峰值在~ 1.3 eV (1.3 eV波段)的PL波段，另一个是峰值在~ 1.35 eV (1.35 eV波段)的PL波段。SEM观察发现，在镜面状晶面的晶体中观察到1.35-eV的能带，而在具有一些小的暗区域的晶体中观察到1.3-eV的能带，这些暗区域的成分是cu贫的。600℃下zn饱和退火导致PL峰位移约0.1 eV，从1.295 eV到1.185 eV。550℃的s饱和退火使发光完全消失。讨论了这些退火行为的含义。
Annealing behaviour of photoluminescence spectra on Cu
2
ZnSnS
4
single crystals
We have measured photoluminescence (PL) spectra at 10 K for Cu2ZnSnS4 (CZTS) single crystals grown by the iodine transport method and explored the anneal changes of PL spectra under a Zn and S-saturation. All the crystals showed S- and Zn-poor composition, and nearly stoichiometric composition of Cu/(Zn + Sn). The observed PL spectra are divided into two groups; one is PL band with a peak at ∼1.3 eV (1.3-eV band), and another is PL band with a peak at ∼1.35 eV (1.35-eV band). It was found from SEM observations that the 1.35-eV band was observed in crystals with a mirror-like facet and, on the other hand, the 1.3-eV band was seen in the crystals with some small dark areas where the composition is Cu-poor. The Zn-saturated annealing at 600 °C caused the PL peak shift of ∼0.1 eV, from 1.295 to 1.185 eV. The S-saturated annealing at 550 °C caused a disappearance of PL emission. The implications of these annealing behaviour are discussed.
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