Abstract
Incorporating interdigitated back-contact electrodes into organic–inorganic halide perovskite solar cells overcomes the optical losses and low architectural defect tolerance present in conventional “sandwich” cell configurations. However, other factors limit device performance in back-contact architectures, such as the short charge-carrier diffusion length within the perovskite film relative to the electrode spacing. As charge-carrier diffusion length is crystal-size related, in order to understand the effect of perovskite morphology on the performance of back-contact perovskite solar cells (bc-PSCs), perovskite films with four different grain cluster sizes, i.e., large, medium, small, and extra small, are fabricated via a solvent annealing approach. Crystallization of the perovskite is found to be closely related to the surface chemistry and topography of the substrate. The bc-PSC photovoltaic performance correlates positively with the perovskite grain cluster size. Through a detailed analysis of transient photovoltage decay measurements, time-resolved photoluminescence, and space charge-limited current measurements, the effect of defect densities associated with grain cluster boundaries is elucidated.
| Original language | English |
|---|---|
| Article number | 1805098 |
| Number of pages | 9 |
| Journal | Advanced Functional Materials |
| Volume | 28 |
| Issue number | 45 |
| DOIs | |
| Publication status | Published - 7 Nov 2018 |
Keywords
- grain clusters
- interdigitated back-contact
- perovskite solar cells
- surface modification
Cite this
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Effect of Grain Cluster Size on Back-Contact Perovskite Solar Cells. / Lin, Xiongfeng; Chesman, Anthony S. R.; Raga, Sonia R.; Scully, Andrew D.; Jiang, Liangcong; Tan, Boer; Lu, Jianfeng; Cheng, Yi-Bing; Bach, Udo.
In: Advanced Functional Materials, Vol. 28, No. 45, 1805098, 07.11.2018.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Effect of Grain Cluster Size on Back-Contact Perovskite Solar Cells
AU - Lin, Xiongfeng
AU - Chesman, Anthony S. R.
AU - Raga, Sonia R.
AU - Scully, Andrew D.
AU - Jiang, Liangcong
AU - Tan, Boer
AU - Lu, Jianfeng
AU - Cheng, Yi-Bing
AU - Bach, Udo
PY - 2018/11/7
Y1 - 2018/11/7
N2 - Incorporating interdigitated back-contact electrodes into organic–inorganic halide perovskite solar cells overcomes the optical losses and low architectural defect tolerance present in conventional “sandwich” cell configurations. However, other factors limit device performance in back-contact architectures, such as the short charge-carrier diffusion length within the perovskite film relative to the electrode spacing. As charge-carrier diffusion length is crystal-size related, in order to understand the effect of perovskite morphology on the performance of back-contact perovskite solar cells (bc-PSCs), perovskite films with four different grain cluster sizes, i.e., large, medium, small, and extra small, are fabricated via a solvent annealing approach. Crystallization of the perovskite is found to be closely related to the surface chemistry and topography of the substrate. The bc-PSC photovoltaic performance correlates positively with the perovskite grain cluster size. Through a detailed analysis of transient photovoltage decay measurements, time-resolved photoluminescence, and space charge-limited current measurements, the effect of defect densities associated with grain cluster boundaries is elucidated.
AB - Incorporating interdigitated back-contact electrodes into organic–inorganic halide perovskite solar cells overcomes the optical losses and low architectural defect tolerance present in conventional “sandwich” cell configurations. However, other factors limit device performance in back-contact architectures, such as the short charge-carrier diffusion length within the perovskite film relative to the electrode spacing. As charge-carrier diffusion length is crystal-size related, in order to understand the effect of perovskite morphology on the performance of back-contact perovskite solar cells (bc-PSCs), perovskite films with four different grain cluster sizes, i.e., large, medium, small, and extra small, are fabricated via a solvent annealing approach. Crystallization of the perovskite is found to be closely related to the surface chemistry and topography of the substrate. The bc-PSC photovoltaic performance correlates positively with the perovskite grain cluster size. Through a detailed analysis of transient photovoltage decay measurements, time-resolved photoluminescence, and space charge-limited current measurements, the effect of defect densities associated with grain cluster boundaries is elucidated.
KW - grain clusters
KW - interdigitated back-contact
KW - perovskite solar cells
KW - surface modification
UR - http://www.scopus.com/inward/record.url?scp=85053706992&partnerID=8YFLogxK
U2 - 10.1002/adfm.201805098
DO - 10.1002/adfm.201805098
M3 - Article
VL - 28
JO - Advanced Functional Materials
JF - Advanced Functional Materials
SN - 1616-301X
IS - 45
M1 - 1805098
ER -