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暨南大学 物理系,广东 广州,510632
纸质出版日期:2010-9-21,
网络出版日期:2010-9-21,
收稿日期:2009-8-24,
修回日期:2009-9-26,
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吴 冰, 刘彭义, 李艳武, 侯林涛. 倒置异质结有机太阳能电池的电子传输层[J]. 发光学报, 2010,31(5): 753-756
WU Bing, LIU Peng-yi, LI Yan-wu, HOU Lin-tao. Electron Transport Layers of Inverted Heterojunction Organic Solar Cells[J]. 发光学报, 2010,31(5): 753-756
制备了结构为ITO/BCP或Alq
3
(
x
=0
2
6
10
20
40 nm)/C
60
(50 nm)/Rubrene(50 nm)/MoO
3
(5 nm)/Al(130 nm)的倒置异质结有机太阳能电池
其中BCP或Alq
3
作电子传输层。实验结果表明:当BCP或Alq
3
6 nm时
器件性能随电子传输层厚度的变化不大;当BCP或Alq
3
10 nm时
随电子传输层厚度的增加
含Alq
3
器件的性能衰减很快
含BCP器件的性能衰减相对较慢
且其开路电压保持不变。分析表明:当电子传输层较薄时
粗糙的ITO使电子较容易从C
60
注入到ITO;当电子传输层较厚时
BCP/C
60
之间的能带弯曲使二者之间几乎不存在势垒
含BCP器件性能较差主要源于BCP较差的电子迁移率
而含Alq
3
器件性能较差主要源于Alq
3
/C
60
之间的势垒。
Inverted heterojunction organic solar cells with a structure of ITO/BCP or Alq
3
(
x
=0
2
6
10
20
40 nm)/C
60
(50 nm)/Rubrene(50 nm)/MoO
3
(5 nm)/Al(130 nm) were prepared
in which BCP or Alq
3
was used as electron transport layer. The experiment results show that when BCP or Alq
3
6 nm
device performance hardly changes with the increase of thickness of electron transport layers; When BCP or Alq
3
10 nm
device performance degrades quickly with the increase of thickness of Alq
3
but slower and open circuit voltage remains unchanged with the increase of thickness of BCP. When electron transport layer is thin
the roughness of ITO makes electrons injection from C
60
into ITO easy; when electron transport layer is thick
since band bending of BCP/C
60
almost make that potential barrier between BCP and C
60
does not exist
the bad device performance with BCP mainly comes from poor BCP electron mobility
that of one with Alq
3
was primarily due to potential barrier between Alq
3
and C
60
.
有机太阳能电池倒置能带弯曲C60
organic solar cellsinvertedband bendingC60
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Wang M L, Song Q L, Wu H R. Small-molecular organic solar cells with C60/Al composite anode
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Maxwell A J, Brhwiler P A, Arvanitis D, et al. Electronic and geometric structure of C60 on Al(111) and Al(110)
.Phys. Rev. B, 1998, 57 (12):7312-7326.
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