Optical properties of ZnO/ZnS and ZnO/ZnTe heterostructures for photovoltaic applications

被引:396
作者
Schrier, Joshua [1 ]
Demchenko, Denis O.
Wang, Lin-Wang
机构
[1] Lawrence Berkeley Natl Lab, Computat Res Div, Berkeley, CA 94720 USA
[2] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA
[3] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
关键词
D O I
10.1021/nl071027k
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Although ZnO and ZnS are abundant, stable, and environmentally benign, their band gap energies (3.44, 3.72 eV, respectively) are too large for optimal photovoltaic efficiency. By using band-corrected pseudopotential density functional theory calculations, we study how the band gap, optical absorption, and carrier localization can be controlled by forming quantum-well-like and nanowire-based heterostructures of ZnO/ZnS and ZnO/ZnTe. In the case of ZnO/ZnS core/shell nanowires, which can be synthesized using existing methods, we obtain a band gap of 2.07 eV, which corresponds to a Shockley-Quiesser efficiency limit of 23%. On the basis of these nanowire results, we propose that ZnO/ZnS core/shell nanowires can be used as photovoltaic devices with organic polymer semiconductors as p-channel contacts.
引用
收藏
页码:2377 / 2382
页数:6
相关论文
共 58 条
[1]   Tuning optical band gap of vertically aligned ZnO nanowire arrays grown by homoepitaxial electrodeposition [J].
Anthony, Savarimuthu Philip ;
Lee, Jeong In ;
Kim, Jin Kon .
APPLIED PHYSICS LETTERS, 2007, 90 (10)
[2]   Hybrid solar cells from regioregular polythiophene and ZnO nanoparticles [J].
Beek, Waldo J. E. ;
Wienk, Martijn M. ;
Janssen, Rene A. J. .
ADVANCED FUNCTIONAL MATERIALS, 2006, 16 (08) :1112-1116
[3]   Hybrid zinc oxide conjugated polymer bulk heterojunction solar cells [J].
Beek, WJE ;
Wienk, MM ;
Kemerink, M ;
Yang, XN ;
Janssen, RAJ .
JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (19) :9505-9516
[4]   Hybrid solar cells using a zinc oxide precursor and a conjugated polymer [J].
Beek, WJE ;
Slooff, LH ;
Wienk, MM ;
Kroon, JM ;
Janssen, RAJ .
ADVANCED FUNCTIONAL MATERIALS, 2005, 15 (10) :1703-1707
[5]   Hybrid polymer solar cells based on zinc oxide [J].
Beek, WJE ;
Wienk, MM ;
Janssen, RAJ .
JOURNAL OF MATERIALS CHEMISTRY, 2005, 15 (29) :2985-2988
[6]   Efficient hybrid solar cells from zinc oxide nanoparticles and a conjugated polymer [J].
Beek, WJE ;
Wienk, MM ;
Janssen, RAJ .
ADVANCED MATERIALS, 2004, 16 (12) :1009-+
[7]  
Cao BQ, 2007, J PHYS CHEM C, V111, P2470, DOI 10.1021/jp0666611
[8]   Finite size effect in ZnO nanowires [J].
Chang, Pai-Chun ;
Chien, Chung-Jen ;
Stichtenoth, Daniel ;
Ronning, Carsten ;
Lu, Jia Grace .
APPLIED PHYSICS LETTERS, 2007, 90 (11)
[9]   Hexagonal nanotubes of ZnS by chemical conversion of monocrystalline ZnO columns [J].
Dloczik, L ;
Engelhardt, R ;
Ernst, K ;
Fiechter, S ;
Sieber, I ;
Könenkamp, R .
APPLIED PHYSICS LETTERS, 2001, 78 (23) :3687-3689
[10]   Photovoltaic effect of ZnO/Si heterostructure [J].
Fu, ZX ;
Lin, BX ;
Liao, GH .
CHINESE PHYSICS LETTERS, 1999, 16 (10) :753-755