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oe1(光电查) - 科学论文

2 条数据
?? 中文（中国） ▾

  • Improvement of Cu(In,Ga)Se <sub/>2</sub> solar cell performance by thiourea treatment

    摘要： We investigated the effects of a thiourea treatment performed to the absorber of Cu(In,Ga)Se2 (CIGS) solar cells. The thiourea treatment successfully improved the open-circuit voltage, fill factor, and conversion efficiency of the solar cells. Reduced ideality factor and reverse saturation current density demonstrated that the suppression of carrier recombination contributed to the improvement in solar cell performance. Increased intensity in cross-sectional electron-beam-induced current measurements confirmed the improved film quality with the thiourea treatment. Additionally, an enhanced carrier density observed with the treatment suggests the passivation of donor-type defects. These results indicate that the thiourea treatment is promising to improve the absorber quality and enhance the performance of CIGS solar cells.

    关键词： thiourea treatment,solar cell,Cu(In,Ga)Se2,carrier recombination,film quality

    更新于2025-09-23 15:21:01

  • CoCl2 as film morphology controller for efficient planar CsPbIBr2 perovskite solar cells

    摘要： High quality perovskite (PVK) film is quite important to reduce the energy loss (Eloss) and enhance the performance of planar CsPbIBr2 PVK solar cells (PSCs). In this work, 5% PbBr2 is substituted by CoCl2 in inorganic CsPbIBr2 PVK, acting as film morphology controller to slow down the crystallization process. It results in a dense and flat pinhole-free CsI(PbBr2)0.95(CoCl2)0.05 PVK film. Therefore, the trap state density is greatly reduced, which lead to reduce non-radiative recombination of carriers and Eloss, therefore, the open-circuit voltage (Voc) of the device is increased from 1.14V of control sample to 1.25V. The optimal photoelectric conversion efficiency (PCE) is enhanced to 10.43% relative to 6.93% of CsPbIBr2 PSCs. More importantly, the air stability of CsI(PbBr2)0.95(CoCl2)0.05 PSCs is greatly enhanced, which still maintain above 90% in the air of 25(cid:1) and RH=20% for 25 days without encapsulation. This work highlights the great effect of CoCl2 as a morphology controller on improving CsPbIBr2 film quality and device performance.

    关键词： energy loss,inorganic perovskite solar cell,crystalline growth,charge transport,film quality

    更新于2025-09-23 15:19:57