All-Perovskite Tandem Solar Cells Approach 26.5% Efficiency by Employing Wide Bandgap Lead Perovskite Solar Cells with New Monomolecular Hole Transport Layer,ACS Energy Letters

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All-Perovskite Tandem Solar Cells Approach 26.5% Efficiency by Employing Wide Bandgap Lead Perovskite Solar Cells with New Monomolecular Hole Transport Layer
ACS Energy Letters ( IF 19.3 ) Pub Date : 2023-08-24 , DOI: 10.1021/acsenergylett.3c01275
Huan Bi _{1,

2} , Jiaqi Liu ₁ , Zheng Zhang ₁ , Liang Wang ₁ , Raminta Beresneviciute ₃ , Daiva Tavgeniene ₃ , Gaurav Kapil ₁ , Chao Ding _{2,

4} , Ajay Kumar Baranwal ₁ , Shahrir Razey Sahamir ₁ , Yoshitaka Sanehira ₁ , Hiroshi Segawa ₅ , Saulius Grigalevicius ₃ , Qing Shen _{1,

2} , Shuzi Hayase _{1,

2}

Affiliation

Self-assembled molecules (SAMs) have been widely employed as hole transport layers (HTLs) that can improve the power conversion efficiency (PCE) of perovskite solar cells (PSCs). However, few SAMs are effective for wide band gap (WBG; E_g = 1.77 eV) PSCs. We found that [3-[4-(diphenylamino)phenyl]-9H-carbazol-9-yl]propylphosphonic acid (4dp3PACz) working as a monomolecular HTL is effective for WPG (FA_0.8Cs_0.2PbI_1.8Br_1.2) PSCs. The 4dp3PACz improved the quality of the perovskite film and reduced the defect density of the film, which reduced the nonradiative recombination and enhanced the carrier transport. 17.17% efficiency is reported. In addition, all-perovskite tandem solar cells consisting of the WBG PSC as the top cell gave 26.47% efficiency.

中文翻译：

采用具有新型单分子空穴传输层的宽带隙铅钙钛矿太阳能电池，全钙钛矿串联太阳能电池效率接近 26.5%

自组装分子（SAM）已被广泛用作空穴传输层（HTL），可以提高钙钛矿太阳能电池（PSC）的功率转换效率（PCE）。然而，很少有 SAM 对宽带隙（WBG；E _g = 1.77 eV）PSC 有效。我们发现[3-[4-(二苯基氨基)苯基]-9H-咔唑-9-基]丙基膦酸(4dp3PACz)作为单分子HTL对WPG有效(FA _0.8 Cs _0.2 PbI _1.8 Br _1.2) PSC。4dp3PACz提高了钙钛矿薄膜的质量，降低了薄膜的缺陷密度，从而减少了非辐射复合，增强了载流子传输。据报告效率为 17.17%。此外，由WBG PSC作为顶部电池组成的全钙钛矿串联太阳能电池的效率为26.47%。

更新日期：2023-08-24

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