scholarly journals Role of Polymer Fractionation in Energetic Losses and Charge Carrier Lifetimes of Polymer: Fullerene Solar Cells

2015 ◽  
Vol 119 (34) ◽  
pp. 19668-19673 ◽  
Author(s):  
Derya Baran ◽  
Michelle S. Vezie ◽  
Nicola Gasparini ◽  
Florent Deledalle ◽  
Jizhong Yao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
Carrier Lifetimes ◽  
Polymer Fractionation

Spatially resolved measurements of charge carrier lifetimes in CdTe solar cells

2013 ◽  
Vol 113 (12) ◽  
pp. 124510 ◽  
Author(s):  
C. Kraft ◽  
H. Hempel ◽  
V. Buschmann ◽  
T. Siebert ◽  
C. Heisler ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
Carrier Lifetimes ◽  
Cdte Solar Cells ◽  
Spatially Resolved

scholarly journals Understanding the visible-light photocatalytic activity of GaN:ZnO solid solution: the role of Rh2−yCryO3 cocatalyst and charge carrier lifetimes over tens of seconds

2018 ◽  
Vol 9 (38) ◽  
pp. 7546-7555 ◽  
Author(s):  
Robert Godin ◽  
Takashi Hisatomi ◽  
Kazunari Domen ◽  
James R. Durrant
Keyword(s):  
Solid Solution ◽  
Photocatalytic Activity ◽  
Charge Carrier ◽  
Water Oxidation ◽  
Carrier Lifetime ◽  
Time Resolved ◽  
Carrier Lifetimes ◽  
Charge Carrier Lifetime ◽  
Visible Light Photocatalytic

Time-resolved spectroscopies reveals remarkably long charge carrier lifetime in GaN:ZnO solid solution leading to hole accumulation key to water oxidation.

Surface Optimization of Random Pyramid Textured Silicon Substrates for Improving Heterojunction Solar Cells

2016 ◽  
Vol 255 ◽  
pp. 338-343 ◽  
Author(s):  
Bert Stegemann ◽  
Jan Kegel ◽  
Lars Korte ◽  
Heike Angermann
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
High Efficiency ◽  
Surface Passivation ◽  
Minority Charge Carrier ◽  
Heterojunction Solar Cells ◽  
Carrier Lifetimes ◽  
Si Substrates ◽  
Deposition Parameters ◽  
Key Steps

Key steps in the fabrication of high-efficiency a-Si:H/c-Si heterojunction solar cells are the controlled pyramid texturing of the c-Si substrates to minimize reflection losses and the subsequent passivation by deposition of a high-quality a-Si:H layer to reduce recombination losses. This contribution reviews our recent results on the optimization of the wet-chemical texturing of crystalline Si wafers for the preparation of heterojunction solar cells with respect to low reflection losses, low recombination losses and long minority carrier lifetimes. It is demonstrated, that by joint optimization of both saw damage etch and texture etch the optical and electronic properties of the resulting pyramid morphology can be controlled. Effective surface passivation and thus long minority charge carrier lifetimes are achieved by deposition of intrinsic amorphous Si ((i) a-Si:H) layers. It is shown, that optimized (i) a-Si:H deposition parameters for planar Si (111) wafers can be transferred to a-Si:H layer deposition on random pyramid textured Si (100) wafers. Statistical analysis of the pyramid size distribution revealed that a low fraction of small pyramids leads to longer minority charge carrier lifetimes and, thus, a higher Voc potential for solar cells.

scholarly journals Efficient Perovskite Solar Cells over a Broad Temperature Window: The Role of the Charge Carrier Extraction

2017 ◽  
Vol 7 (22) ◽  
pp. 1701305 ◽  
Author(s):  
Shuyan Shao ◽  
Jian Liu ◽  
Hong-Hua Fang ◽  
Li Qiu ◽  
Gert H. ten Brink ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Carrier ◽  
Perovskite Solar Cells ◽  
Temperature Window ◽  
Carrier Extraction

Carrier Transport and Recombination In A-SI:H P-I-N Solar Cells in Dark and Under Illumination

2003 ◽  
Vol 762 ◽  
Author(s):  
J. Deng ◽  
J.M. Pearce ◽  
V. Vlahos ◽  
R.J. Koval ◽  
R.W. Collins ◽  
...  
Keyword(s):  
Solar Cells ◽  
Carrier Transport ◽  
Short Circuit ◽  
Forward Bias ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Potential Barriers ◽  
Carrier Lifetimes ◽  
Wide Range

AbstractA study has been carried out on the forward bias dark current and the short circuit current -open circuit voltage characteristics of a-Si:H p-i-n solar cells over wide range of illumination intensities. Results are presented with superposition of these characteristics over extended current voltage regimes. This and the observed separation between these characteristics are consistent with the arguments presented based on first principle arguments. The conclusions drawn about the role of photo-generated carrier lifetimes, the densities of defects and the potential barriers in the i-layers adjacent to the n and p contacts are confirmed by numerical simulations. The key role of these potential barriers to the split in the characteristics offer new insight into both why the lack of superposition has been observed and the erroneous conclusions drawn about carrier transport for a-Si:H solar cells in the dark and under illumination.

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