Evolution of Long Range Bandgap Tunable Lead Sulfide Nanocrystals with Photovoltaic Properties
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- 作者：Ali Hossain Khan ; Umamahesh Thupakula ; Amit Dalui ; Subrata Maji ; Anupam Debangshi ; Somobrata Acharya
- 刊名：The Journal of Physical Chemistry C
- 出版年：2013
- 出版时间：April 18, 2013
- 年：2013
- 卷：117
- 期：15
- 页码：7934-7939
- 全文大小：492K
- 年卷期：v.117,no.15(April 18, 2013)
- ISSN：1932-7455
文摘
Monodispersed bandgap tunable lead sulfide nanocrystals ranging from 0.6 to 1.7 eV have been synthesized by adjusting the reaction temperature and growth time. An evolution from cuboctahedra to perfect cube takes place at higher reaction temperature with longer annealing time. The nanocrystals absorb light both in the visible and IR spectral range. Bandgap dependent photovoltaic studies reveal optimal device performance for a critical size nanocrystal with 1.2 eV bandgap revealing the role of optimum bandgap on the photovoltaic performance.