The development of a stable roll-to-roll(R2R) manufacturing process for the production of large-area flexible perovskite solar cells (PSCs) remains a crucial issue. In this study, the electron transfer layer(ETL) and perovskite layer coating processes were adjusted to optimize a two-step deposition ...
The development of a stable roll-to-roll(R2R) manufacturing process for the production of large-area flexible perovskite solar cells (PSCs) remains a crucial issue. In this study, the electron transfer layer(ETL) and perovskite layer coating processes were adjusted to optimize a two-step deposition method suitable for R2R process and annealed by intensive pulsed light (IPL) methods and fabricated R2R processed flexible PSCs. First, PEI was added to uniformly coat the ETL. When manufacturing flexible solar cells, if a defect occurs in the first layer, ETL, it will affect all layers. For this reason, PEI-added SnO2 achieved clean deposition without pinholes in R2R process. Second, the solution feeding rate was adjusted to optimize the two-step deposition method in the R2R process. When the PbI2 solution feeding rate was fixed and the FAI solution feeding rate was increased, the PbI2 was completely reacted to convert to perovskite. Finally, to rapidly convert PbI2 to perovskite, which is the main issue for two step R2R deposition, we utilized an IPL annealing process and added additive to PbI2. The highest power conversion efficiency (PCE) achieved for the R2R-processed perovskite films was 16.87%, representing the highest reported value for R2R two-step processed PSCs. However, these PSCs exhibited hysteresis in both the reverse and forward PCE. To mitigate this hysteresis by promoting perovskite crystal growth, we introduced a dual-annealing process (IPL followed by 2 min heating), which is suitable for R2R processing. The dual sintering process reduced the hysteresis, resulting in low-hysteresis R2R-processed flexible PSCs.
The development of a stable roll-to-roll(R2R) manufacturing process for the production of large-area flexible perovskite solar cells (PSCs) remains a crucial issue. In this study, the electron transfer layer(ETL) and perovskite layer coating processes were adjusted to optimize a two-step deposition method suitable for R2R process and annealed by intensive pulsed light (IPL) methods and fabricated R2R processed flexible PSCs. First, PEI was added to uniformly coat the ETL. When manufacturing flexible solar cells, if a defect occurs in the first layer, ETL, it will affect all layers. For this reason, PEI-added SnO2 achieved clean deposition without pinholes in R2R process. Second, the solution feeding rate was adjusted to optimize the two-step deposition method in the R2R process. When the PbI2 solution feeding rate was fixed and the FAI solution feeding rate was increased, the PbI2 was completely reacted to convert to perovskite. Finally, to rapidly convert PbI2 to perovskite, which is the main issue for two step R2R deposition, we utilized an IPL annealing process and added additive to PbI2. The highest power conversion efficiency (PCE) achieved for the R2R-processed perovskite films was 16.87%, representing the highest reported value for R2R two-step processed PSCs. However, these PSCs exhibited hysteresis in both the reverse and forward PCE. To mitigate this hysteresis by promoting perovskite crystal growth, we introduced a dual-annealing process (IPL followed by 2 min heating), which is suitable for R2R processing. The dual sintering process reduced the hysteresis, resulting in low-hysteresis R2R-processed flexible PSCs.
Keyword
#roll-to-roll two-step slot die intensive pulsed light perovskite solar cell
학위논문 정보
저자
박건영
학위수여기관
전북대학교 대학원
학위구분
국내석사
학과
반도체.화학공학부(화학공학)
지도교수
김민
발행연도
2024
총페이지
viii, 77 p.
키워드
roll-to-roll two-step slot die intensive pulsed light perovskite solar cell
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