Abstract
Recently, environmental-friendly, solution-processed, flexible Cu(In,Ga)(S,Se)2 devices have gained significant interest, primarily because the solution deposition method enables large-scale and low-cost production of photovoltaics, and a flexible substrate can be implemented on uneven surfaces in various applications. Here, we suggest a novel green-chemistry aqueous ink that is readily achievable through the incorporation of molecular precursors in an aqueous medium. A copper formate precursor was introduced to lower the fabrication temperature, provide compatibility with a polyimide plastic substrate, and allow for high photovoltaic performance. Through a comparative spectroscopic study on temperature-dependent chemical/crystal structural evolution, the chemical role of copper formate was elucidated, which led to the chalcopyrite framework that was appropriate to low-temperature annealed Cu(In,Ga)S2 absorber layers at 400 °C. This Cu(In,Ga)S2 solar cell exhibited a power conversion efficiency of 7.04% on a rigid substrate and 5.60% on a polymeric substrate. Our cell on the polymeric substrate also demonstrated both acceptable mechanical flexibility and durability throughout a repeated bending test of 200 cycles.
| Original language | English |
|---|---|
| Pages (from-to) | 17740-17747 |
| Number of pages | 8 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 6 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - 2014 Oct 22 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
Cite this
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Role of anions in aqueous sol-gel process enabling flexible Cu(In,Ga)S2 thin-film solar cells. / Oh, Yunjung; Woo, Kyoohee; Lee, Daehee; Lee, Hongseuk; Kim, Kyujin; Kim, Inhyuk; Zhong, Zhaoyang; Jeong, Sunho; Moon, Jooho.
In: ACS Applied Materials and Interfaces, Vol. 6, No. 20, 22.10.2014, p. 17740-17747.Research output: Contribution to journal › Article
TY - JOUR
T1 - Role of anions in aqueous sol-gel process enabling flexible Cu(In,Ga)S2 thin-film solar cells
AU - Oh, Yunjung
AU - Woo, Kyoohee
AU - Lee, Daehee
AU - Lee, Hongseuk
AU - Kim, Kyujin
AU - Kim, Inhyuk
AU - Zhong, Zhaoyang
AU - Jeong, Sunho
AU - Moon, Jooho
PY - 2014/10/22
Y1 - 2014/10/22
N2 - Recently, environmental-friendly, solution-processed, flexible Cu(In,Ga)(S,Se)2 devices have gained significant interest, primarily because the solution deposition method enables large-scale and low-cost production of photovoltaics, and a flexible substrate can be implemented on uneven surfaces in various applications. Here, we suggest a novel green-chemistry aqueous ink that is readily achievable through the incorporation of molecular precursors in an aqueous medium. A copper formate precursor was introduced to lower the fabrication temperature, provide compatibility with a polyimide plastic substrate, and allow for high photovoltaic performance. Through a comparative spectroscopic study on temperature-dependent chemical/crystal structural evolution, the chemical role of copper formate was elucidated, which led to the chalcopyrite framework that was appropriate to low-temperature annealed Cu(In,Ga)S2 absorber layers at 400 °C. This Cu(In,Ga)S2 solar cell exhibited a power conversion efficiency of 7.04% on a rigid substrate and 5.60% on a polymeric substrate. Our cell on the polymeric substrate also demonstrated both acceptable mechanical flexibility and durability throughout a repeated bending test of 200 cycles.
AB - Recently, environmental-friendly, solution-processed, flexible Cu(In,Ga)(S,Se)2 devices have gained significant interest, primarily because the solution deposition method enables large-scale and low-cost production of photovoltaics, and a flexible substrate can be implemented on uneven surfaces in various applications. Here, we suggest a novel green-chemistry aqueous ink that is readily achievable through the incorporation of molecular precursors in an aqueous medium. A copper formate precursor was introduced to lower the fabrication temperature, provide compatibility with a polyimide plastic substrate, and allow for high photovoltaic performance. Through a comparative spectroscopic study on temperature-dependent chemical/crystal structural evolution, the chemical role of copper formate was elucidated, which led to the chalcopyrite framework that was appropriate to low-temperature annealed Cu(In,Ga)S2 absorber layers at 400 °C. This Cu(In,Ga)S2 solar cell exhibited a power conversion efficiency of 7.04% on a rigid substrate and 5.60% on a polymeric substrate. Our cell on the polymeric substrate also demonstrated both acceptable mechanical flexibility and durability throughout a repeated bending test of 200 cycles.
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U2 - 10.1021/am504194t
DO - 10.1021/am504194t
M3 - Article
AN - SCOPUS:84908170855
VL - 6
SP - 17740
EP - 17747
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 20
ER -