SinoTechIntel |SinoBioData |SinoGreenTech |SinoAILab
SinoGreenTech Academic Portal
Open Access Archive
SinoGreenTech
Clean Energy & Battery Portal
Search Database
GS
Verified CAS / Academic Author2 Decoded Studies

Prof. GUAN Shi

State Key Laboratory of Silicon and Advanced Semiconductor Materials, Zhejiang University

Co-Affiliations:Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China

Research Publications & English Decoded Briefs

Showing 2 publications
SCIENCE CHINA Materials•2026•DOI: 10.1007/s40843-025-3451-2

Organic Solar Windows with Full Visual Aesthetics

Visual aesthetics is a key metric of semi-transparent organic photovoltaics (ST-OPVs) for building-integrated solar windows, yet previous studies have primarily focused on the compromise between efficiency and transparency. This work addresses the overlooked aspect of full visual aesthetic control, particularly the bidirectional reflected color for architectural harmony, via designing ST-OPVs with double-sided ultra-thin Ag/TeO2 transparent electrodes. This design facilitates full-spectrum color tunability covering the whole standard color gamut of CIE coordinates on both surfaces, achieved simply by adjusting layer thicknesses. The resulting devices exhibit neutral transparency (16.6%–27.0% average visible transmittance) and competitive power conversion efficiencies (8.1%–9.2%). Additionally, the devices demonstrate strong flexibility, with flexibility-adaptive coloration and curvature-enhanced aesthetics. This work presents an ST-OPV design featuring full visual aesthetics and considerable performance, paving the way for commercialization of organic solar windows for building and vehicle integration.

Read Full Analysis→Download Authentic PDF
SCIENCE CHINA Materials•2025•DOI: 10.1007/s40843-025-3366-9

Organic Solar Cells Surpassing 20% Power Conversion Efficiency: Material Innovations, Device Engineering, and Pathways to Flexible Power Suppliers

Organic solar cells (OSCs) have transitioned from <1% initial power conversion efficiency (PCE) to a benchmark exceeding 20% in single-junction and tandem architectures, marking a critical milestone for solution-processable photovoltaics. This review consolidates recent reports (2022–2025) on OSCs with PCE >20%, analyzing key strategies: photoactive material innovation (wide-bandgap polymer donors, narrow-bandgap non-fullerene acceptors), multi-component system construction, deposition protocol optimization, solid/solvent additive engineering, and hole/electron transport layer development. Empirical data from 15 high-impact studies reveal PCEs of 20.0–20.6% in single-junction devices and 20.2–26% in perovskite/organic tandem cells, with interfacial engineering (e.g., yttrium phosphotungstate, carbazole-modified 2PACz, naphthalene diimide interlayers) suppressing bimolecular recombination and enabling scalable large-area fabrication. Operational stability remains a bottleneck: amide-based cathode interlayers achieve 20% PCE with dual-modification mechanisms, while self-assembled monolayers enable hole transport layer-free devices with 18% efficiency and improved stability. The review identifies next-stage challenges: reducing voltage losses (to <0.5 V), scaling deposition uniformity beyond 100 cm², and achieving cost parity with silicon (<$0.30/Wp). These issues are critical for flexible and wearable power suppliers, where mechanical durability (<5% PCE degradation after 1000 bending cycles) and low-temperature processing (<150°C) are mandatory. The analysis provides a roadmap for industrial translation, emphasizing that material–device co-optimization, rather than isolated breakthroughs, will determine commercial viability.

Read Full Analysis→Download Authentic PDF