Park Geon Yeong, Kim Min-Jae, Oh Joon Young, Kim Hoimin, Kang Boseok, Cho Seong-Keun, Choi Woo Jin, Kim Min, Ham Dong Seok
Chemical Materials Solutions Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea.
Department of Chemical Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea.
ACS Appl Mater Interfaces. 2024 May 29;16(21):27410-27418. doi: 10.1021/acsami.4c04153. Epub 2024 May 13.
The development of a stable roll-to-roll (R2R) process for flexible large-area perovskite solar cells (PSCs) and modules is a pressing challenge. In this study, we introduced a new R2R PSC manufacturing system that employs a two-step deposition method for coating perovskite and uses intensive pulsed light (IPL) for annealing. This system has successfully fabricated small-sized cells and the first-ever large-sized, R2R-processed flexible modules. A key focus of our work was to accelerate the conversion of PbI to perovskite. To this end, we utilized IPL annealing and incorporated additives into the PbI layer. With these modifications, the R2R-processed perovskite films achieved a power conversion efficiency (PCE) of 16.87%, representing the highest reported value for R2R two-step processed PSCs. However, these cells exhibited hysteresis in reverse and forward PCE measurements. To address this, we introduced a dual-annealing process consisting of IPL followed by a 2-min thermal heating step. This approach successfully reduced hysteresis, resulting in low-hysteresis, R2R-processed flexible PSCs. Moreover, we fabricated large-scale flexible modules (10 × 10 cm) with a PCE of 11.25% using the dual-annealing system, marking a significant milestone in this field.
开发用于柔性大面积钙钛矿太阳能电池（PSC）和组件的稳定卷对卷（R2R）工艺是一项紧迫的挑战。在本研究中，我们引入了一种新的R2R PSC制造系统，该系统采用两步沉积法涂覆钙钛矿，并使用强脉冲光（IPL）进行退火。该系统已成功制造出小型电池以及有史以来第一个经过R2R工艺处理的大型柔性组件。我们工作的一个关键重点是加速PbI向钙钛矿的转化。为此，我们利用IPL退火并在PbI层中加入添加剂。通过这些改进，经过R2R工艺处理的钙钛矿薄膜实现了16.87%的功率转换效率（PCE），这是R2R两步法处理的PSC报道的最高值。然而，这些电池在反向和正向PCE测量中表现出滞后现象。为了解决这个问题，我们引入了一种由IPL和随后2分钟热加热步骤组成的双重退火工艺。这种方法成功地减少了滞后现象，得到了低滞后、经过R2R工艺处理的柔性PSC。此外，我们使用双重退火系统制造了大面积柔性组件（10×10 cm），其PCE为11.25%，这标志着该领域的一个重要里程碑。
