journal article·2020-02-06Open access

Diammonium-Cesium Lead Halide Perovskite with Phase-Segregated Interpenetrating Morphology for Photovoltaics

Ziren Zhou, Shuang Yang, Kaixuan Xu, Hong Wei Qiao, Jin Xie, Zeqing Lin, Bing Ge, Jingjing He, Mengjiong Chen, Jun Zhang, Yu Hou, Hua Gui Yang

Abstract

The insertion of organic spacers into halide perovskite slabs has offered a trade-off between the efficiency and stability of perovskite solar cells (PSCs). The layered structure of diammonium-intercalated cesium lead halide perovskites is virtually unexplored, in contrast to several works on the monoammonium system. In this report, we find that perovskite with 1,4-butanediammonium (BDA) and cesium cations can only form n = 1 and n = 2 layered isologues defined by the chemical formula of (BDA)Cs n –1 Pb n (I 0.7 Br 0.3 ) 3 n +1, while the n = 3–4 ones will self-construct into unique heterostructures comprising separated quantum wells (QWs; n = 1–2) and 3D ( n = ∞) perovskites. We highlight that the 2D/3D heterostructures show a structural resemblance to that of bulk heterojunction in organics, thus improving the charge separation and transport more than surface passivation. Solar cells based on the (BDA)Cs 3 Pb 4 I 9.1 Br 3.9 ( n = 4) absorbing layer delivered a power conversion efficiency (PCE) reaching 9.49% with ideal light and thermal stability.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Quantum Dots Synthesis And Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China

State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing,100083, China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Beijing Academy of Quantum Information Science, Beijing 100193, China

Funding

Shanghai Municipal Education Commission · Science and Technology Commission of Shanghai Municipality · National Natural Science Foundation of China · China Academy of Space Technology · Shanghai Engineering Research Center of Hierarchical Nanomaterials, East China University of Science and Technology

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